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Haruko Momoi
Haruko Momoi
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Haruko Momoi (Japanese: 桃井 はるこ, Hepburn: Momoi Haruko; born December 14, 1977) is a Japanese singer, songwriter and voice actress. She is one of the founders of an all-female pop group called Afilia Saga.[1][2] She was born in Tokyo, Japan and is affectionately referred to as Halko by her fans, a nickname she gave herself which is inspired by HAL 9000, the computer in the film 2001: A Space Odyssey.[3]

Key Information

Biography

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Career

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Haruko took interest in personal computers from a young age and studied personal computer communications during high school. After she graduated from Tokyo Metropolitan Yoyogi High School [ja], her articles and writing on her online blog caught the attention of the chief editor of the Weekly ASCII magazine. She was later offered a job as a writer for the magazine.[4]

During the late nineties, Haruko began singing and doing live performances on the streets of Harajuku and Akihabara. She then debuted her single "Mail Me," a cover version of which appears in the movie Suicide Circle in 2001. Soon after, she debuted as a voice actress for her role as Komugi Nakahara in Nurse Witch Komugi. In 2001, she paired with Masaya Koike to form the duo UNDER17 and together performed songs for adult and mainstream video games and anime. After their last album Best Album 3 ~Soshite Densetsu e...~ and a live tour of the same name, UNDER17 separated in 2004 citing creative differences, and the two musicians have since gone their separate ways. She continued on with her solo singing career and in 2006, was signed under avex mode as a music composer and singer.

In 2007, Halko published an autobiography entitled Akihaba-LOVE, in which she tells of the major experiences that shaped her life, mainly those that were important in constructing her career as a musician and voice actress, but it also includes anecdotes from her childhood and stories of friendship, as well as personal opinions on different aspects of anime fandom.[5]

Filmography

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Anime

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2001
2002
2003
2004
2005
2006
2007
2008
2011
2014
2017
2018

OVA

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Anime Movie

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Tokusatsu

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Games

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  • Yunyun Syndrome!? Rhythm Psychosis (Yunyun)

Miscellaneous

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Radio

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Drama CD

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  • Ai Yori Aoshi series (Chika Minazuki)
  • Tales of the Abyss series (Anise Tatlin)
  • Prism Ark Special Sound Package (Filia)
  • Prism Ark Drama CD: Sister Hell Prism Variation (Filia)
  • Ragnarok The Animation Ver.1-Ver.3 (Maya)
  • Poporaji (Mii)

Television

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Discography

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Singles

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Date Released Single Name
May 24, 2000 Mail Me
July 27, 2005 Ton Dol Baby (トンドルベイビー)
October 19, 2005 WONDER MOMO-i~New recording~
November 8, 2006 Saigo no Rock (さいごのろっく)
December 6, 2006 Yume no Baton (ゆめのばとん)
December 27, 2006 Enter!
March 28, 2007 21 Seiki (21世紀)
October 10, 2007 Party!
October 25, 2007 Yuuen no Amulet/Opera Fantasia (悠遠のアミュレット/オペラファンタジア)
October 25, 2007 R・G・B...
November 14, 2007 Lumica (ルミカ)
April 29, 2009 Ruujii Guujii (るーじー・ぐーじー)
June 17, 2009 ☆Jien Otsu☆Song (☆自演乙☆ソング)
March 2, 2011 Yoake no Samba (夜明けのサンバ)
June 22, 2011 Ganbare... Sore wa, I Love You (がんばれ...それは、I Love You)
May 23, 2012 Hikounin Sentai Akibaranger (非公認戦隊アキバレンジャー)
June 7, 2017 Junai Marionette (純愛マリオネット)
November 8, 2017 Hoshizora Dancing (星空ダンシング)

Albums

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Date Released Album Name
August 9, 2006 momo-i quality
February 21, 2007 Haruko☆UP DATE SONGS BEST (はるこ☆UP DATE SONGS BEST)
March 21, 2007 Famison 8BIT (ファミソン8BIT)
June 8, 2007 Famison 8BIT STAGE2 (ファミソン8BIT STAGE2)
June 20, 2007 COVER BEST - Cover Densha (COVER BEST カバー電車)
March 5, 2008 Sunday early morning
December 3, 2008 more&more quality RED ~Anime song cover~
December 3, 2008 more&more quality WHITE ~Self song cover~
September 30, 2009 Henji Ga Nai, Tada No Shitsuren No Youda (へんじがない、ただのしつれんのようだ。)
September 15, 2010 IVY ~Aibii~ (IVY 〜アイビー〜)
August 24, 2011 Showa (しょうわ)
October 24, 2012 'Angya' Momo-i's World Tour (あんぎゃ 〜モモーイ世界の旅〜)
October 21, 2015 STAY GOLD
July 20, 2016 Pink Hippo Album ~Self Cover Best~
August 8, 2018 pearl

Anime Singles

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Date Released Single Name
November 1, 2006 LoveLoveLove no Sei na no yo! (LoveLoveLoveのせいなのよ!)
April 25, 2007 Romantic Summer
May 23, 2007 your gravitation
August 22, 2007 Dan Dan Dan
August 27, 2008 Feel So Easy

DVD

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  • momo-i Live DVD (avex mode)
  • Haruko☆UP DATE (Pony Canyon)
  • CLIP BEST (avex mode)
Simultaneous release with the album Sunday early morning on March 5, 2008 with the making-of of her PVs and image collection.

Book

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  • Akihaba LOVE ~Akihabara to issho ni otona ni natta~

Convention appearances

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Momoi performs at FanimeCon 2010.
Momoi at FanimeCon 2011

Momoi has appeared in various convention concerts outside Japan. To date, she has visited the United States, Germany, Canada, Mexico, Finland, United Kingdom and Russia.

References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Haruko Momoi

View on Grokipedia
from Grokipedia
Haruko Momoi (桃井 はるこ, Momoi Haruko), born December 14, 1977, in , , is a multifaceted Japanese artist renowned as a voice actress, , and . Affectionately known as "Halko" among fans, she stands at 160 cm tall with O, and her hobbies include collecting T-shirts and internet browsing. Momoi's voice acting career spans numerous , video games, and live-action projects, where she has brought to life iconic characters such as Faris Nyannyan in the television series, Anise Tatlin in the video game series, San Seto in , and Chika Minazuki in . She also portrayed herself in the live-action series , blending her real-life persona with fictional elements tied to Akihabara's culture. Her vocal talents extend to theme songs, including contributions to and , showcasing her versatility in the industry. In music, Momoi debuted as a solo artist with the single "Mail Me" in 2000 and later served as the of the music duo UNDER17 from 2002 until its disbandment in 2004, releasing several singles during that period. She has since established herself as a prolific and composer, creating pieces for projects like the all-female Afilia Saga (which she produces), voice actress units such as RO-KYU-BU!, and various s. As of 2025, she continues her music career, celebrating her 25th anniversary since debut with new single releases. Dubbed the "Original Queen of Akiba" for her deep ties to Akihabara's idol and scene, Momoi has performed extensively internationally, completing 36 trips across 15 countries from 2005 to 2013, including regions in , , and . Additionally, she has served as a —with a serialized column in a —and performer at idol events and concerts.

Biography

Early life

Haruko Momoi was born on December 14, 1977, in , . She was raised in the bustling urban environment of the city, which shaped her early exposure to technology and pop culture. From a young age, Momoi showed a keen interest in s and technology. During her time at Tokyo Metropolitan Yoyogi High School, she focused on studying personal computer communications, exploring online interactions and digital tools that were emerging at the time. In her pre-professional years, Momoi's hobbies centered around digital expression and culture. She maintained an online discussing and Akihabara's vibrant scene, which attracted the notice of the chief editor at Weekly ASCII, a prominent tech magazine; this led to her contributing articles as a . As a teenager and young adult, she also began impromptu street performances in areas like and , singing and engaging with crowds in these iconic districts.

Music career

Haruko Momoi began her music career in the late with independent releases and street performances in , establishing herself as an underground idol known for her energetic live shows. Her solo debut came in 2000 with the single "Mail Me," released on King Records, which marked her entry into major-label distribution and featured her as a vocalist, , and . This period included early works like the 1997 mini-album Dennou Shoujo Baacharianko, where she handled vocals, composition, and lyrics, focusing on themes tied to video games and digital culture. In 2001, Momoi formed the pop-rock duo UNDER17 with guitarist Masaya Koike, serving as vocalist and lyricist; the group specialized in theme songs for adult video games, , and , releasing several albums and gaining a for their high-energy performances. UNDER17 disbanded in November 2004 following their national tour, primarily due to creative differences between Momoi and Koike, after which Momoi pursued solo endeavors. She signed with Avex Mode in 2006 as a and singer, releasing her first major-label compilation album momo-i quality Best of Momo-i that August, which collected re-recorded indie-era tracks including and game themes, peaking at No. 69 on the chart. Momoi co-founded the all-female idol group Afilia Saga in 2009 with producer Chiyomaru Shikura, taking on roles as primary songwriter, composer, and occasional performer; the group drew from Akihabara's maid cafe culture, incorporating magical and technological motifs in its performances and music to appeal to otaku audiences. She contributed lyrics and compositions to numerous Afilia Saga tracks, such as "Magical Express Journey," emphasizing the group's "magic" concept of blending fantasy with everyday idol energy. Post-2010, Momoi shifted to independent production under labels like Tokyo Torico, releasing self-produced albums including STAY GOLD in 2015, which featured original tracks like "Kaito" showcasing her matured pop style. Throughout her career, Momoi has written and composed for her own releases as well as themes, including contributions to series like Akahori Gedō Hour Rabuge where she handled theme song , composition, and performance. Her songwriting often intersects with her work through character songs and media tie-ins, though her primary focus remains on original pop and rock productions.

Voice acting career

Haruko Momoi entered the voice acting industry in 2001 through an audition process, securing her debut role as the energetic nurse Komugi Nakahara in the anime series The SoulTaker. This opportunity arose shortly after her music debut, leveraging her background in Akihabara street performances and otaku culture, which influenced her tech-savvy and playful delivery style. Her early career featured supporting roles in series like Final Fantasy: Unlimited (2001) as Ai Hayakawa, establishing her as a versatile seiyū capable of blending humor and whimsy. Momoi's breakthrough came in 2007 with the role of San Seto in My Bride is a Mermaid, whose strong-willed and energetic personality resonated with audiences and solidified her reputation for "genki" (energetic) portrayals with a tsundere edge. This was followed by her standout performance as Faris Nyannyan (Rumiho Akiha) in Steins;Gate (2011), a cat-eared maid with a tsundere edge, which showcased her ability to infuse moe (cute) archetypes with depth and humor, earning widespread fan acclaim. Her style, often infused with Akihabara-inspired references, led to typecasting in upbeat, otaku-adjacent characters during the 2000s. Post-2010, Momoi evolved beyond moe and genki typecasting, taking on more diverse roles such as the strong-willed Sun Seto in (2007, extended run) and mature figures in later works, reflecting her growing range as a . As of 2025, she is affiliated with the agency Amuleto. While she has not received major industry awards, Momoi has garnered significant fan recognition, including mentions in seiyū award fan polls for her iconic roles and contributions to media. Her often intersects briefly with her career, such as performing ending themes for series like Lucky Star.

Filmography

Television anime

Haruko Momoi made her debut in television as Komugi Nakahara, the cheerful and determined protagonist, in : Tamashii-gari (2001). Over the course of her career, she has voiced characters in approximately 29 television series, frequently portraying energetic, quirky young women or animal-like sidekicks in supporting or lead capacities. Her roles span a variety of genres, from fantasy and romance to , with particular emphasis on recurring characters in long-running franchises. In 2002, Momoi voiced Marduke, a mischievous alien supporting character, in UFO Princess Valkyrie. She followed this in 2003 with Chika Minazuki, a lively and supportive college student friend to the leads, in Ai Yori Aoshi. That same year, she provided the voice for Mii, the curious and playful young girl central to the whimsical household dynamics, in Popotan. Also in 2003, as Tama-chan, a bubbly fairy in Bottle Fairy, Momoi brought energy to the group's antics in their miniature world. Her role as Ai Hayakawa, a brave young girl on a fantastical quest alongside her brother, marked a lead performance in Final Fantasy: Unlimited (2003). Momoi's 2004 contributions included Maya, a resourceful and combat-savvy priestess essential to the party's adventures, in Ragnarök the Animation. She voiced the iconic Maromi, the adorable yet eerie dog-like mascot symbolizing urban paranoia, in Paranoia Agent (2004). In Ryuusei Sentai Musumet (2004), she played Kou Saotome, a heroic and spirited team member fighting extraterrestrial threats. By 2005, Momoi reprised Utamaru, the sassy talking squirrel familiar providing comic relief, in Da Capo Second Season. In 2006, she took on Marin Nijihara, a caring magical girl navigating school life and supernatural duties, as a main character in Magikano. Her performance as Mai Nonomiya, an ambitious aspiring idol balancing fame and friendships, highlighted her in Lovedol Lovely Idol (2006). One of Momoi's most prominent roles came in 2007 as San Seto, the fierce yet affectionate mermaid princess protecting her human fiancé, serving as the energetic lead in My Bride is a Mermaid. She also voiced Filia, a loyal and battle-hardened knight devoted to her comrades, in Prism Ark (2007). In 2008, Momoi played Anise Tatlin, the cunning and cheerful young agent with a manipulative streak, as a key supporting character in Tales of the Abyss. She returned to familiar territory in 2011 with Rumiho Akiha (Faris Nyannyan), the eccentric cat-eared barmaid and loyal friend adding humor and tech savvy to the time-travel plot, in Steins;Gate. This role recurred in Steins;Gate 0 (2018), where Faris continues as a steadfast ally amid emotional turmoil. Later highlights include Momo Tsukumo, a bold and passionate otaku girl entangled in Akihabara's supernatural conflicts, in Akiba's Trip: The Animation (2017). In Nurse Witch Komugi-chan R (2016), she voiced multiple characters, including the clumsy nurse Koharu Yoshida and the magical girl Hime-P, tying back to her debut series. Momoi's most recent television anime appearance was as PAC2-AR, the quirky robotic assistant aiding the bumbling space crew, in Space Battleship Tiramisu (2018) and its second season.

Anime films and OVAs

Haruko Momoi has contributed to a variety of feature films and original video animations (OVAs), spanning genres such as comedy, fantasy, and sci-fi, often portraying energetic or quirky female characters. Her roles in these non-televised formats include lead performances in spin-off series and supporting parts in theatrical releases, extending narratives from popular franchises. In 2002, she voiced Sonnano in the short Pokémon film Camp Pikachu, a lighthearted adventure featuring the Pokémon characters on a camping trip. That same year, Momoi led the OVA series Nurse Witch Komugi-chan Magikarte as Komugi Nakahara (also known as Magical Nurse Komugi), a parody spin-off blending magical girl tropes with medical comedy elements. Her 2004 contributions included the lead role of Chiyu (12-year-old version) in the promotional OVA Netrun-mon the Movie, centered on digital world explorations, and Komugi Nakahara in the sequel OVA Nurse Witch Komugi-chan Magikarte Z, continuing the humorous magical nurse storyline. In 2005, Momoi voiced Tsukune in the fantasy OVA series Majokko Tsukune-chan, depicting a young witch's mischievous adventures, and multiple characters including Marduke in , an extension of the franchise involving alien antics. The year 2006 saw her as Shinobu Enomoto in the comedy OVA Kujibiki Unbalance, a fictional -within-anime exploring elections, and Mar in , a special episode bridging the series' storylines. She also reprised roles like Keiko Sonoda in , further developing the franchise's time-travel themes. Additionally, she had a minor role as a theatre department staff member in episode 2 of the romance OVA Natsuiro no Sunadokei. Momoi voiced Mai Nonomiya in the 2007 idol-themed OVA Lovedol Lovely Idol, following aspiring performers in the entertainment industry. In 2008, she portrayed San Seto in the picture drama OVAs for (Seto no Hanayome OVA), supplementing the main series' yakuza-mermaid romance with comedic shorts, and Utamaru in D.C. I&F Da Capo If, a side story in the adaptation exploring alternate scenarios. From 2009 to 2012, she led as Yurume Aida in the slice-of-life OVAs Yurumates (2009), Yurumates 3D OVA (2012), and Yurumates 3D Plus: Natsuyasumi Maison du Wish Report (2012), depicting relaxed roommate dynamics in a shared setting. In 2013, Momoi reprised her role as Rumiho Akiha (Faris Nyannyan) in the feature film : The Movie - Load Region of , a to the TV series that delves into time-leap consequences within the sci-fi thriller narrative.

Video games

Haruko Momoi began her career in video games with and expanded into console RPGs, often portraying energetic or quirky supporting characters. Her roles span from early PC titles to later multi-platform releases, with notable recurring performances in popular franchises. In 2000, she voiced Asou Natsume in the action BALDR BULLET for , an early supporting role in the series. By 2002, Momoi lent her voice to Utamaru, a tanuki character, in the romance D.C. Da Capo for PC, which became a significant entry in her portfolio due to the series' enduring popularity. She followed with Chika Minazuki in the 2003 adaptation of for PC, portraying a lively character. Momoi's 2004 role as Tia in the tactical RPG Stella Deus: The Gate of Eternity for marked her entry into console gaming, where she voiced a key ally in the game's fantasy narrative. The following year, she achieved prominence voicing Anise Tatlin, a mischievous young agent and playable party member, in the acclaimed RPG for , a role she reprised in spin-offs including Tales of the World: Radiant Mythology 2 (2009, ), Tales of VS. (2010, arcade), and Tales of the World: Radiant Mythology 3 (2011, ). Also in 2005, she voiced Pinky in the strategy RPG Spectral Force for Xbox 360. In 2006, Momoi voiced Filia in the fantasy visual novel Prism Ark Prism Heart Episode 2 for PC, contributing to its adventure storyline. Her 2009 performance as Faris Nyannyan (also known as Rumiho Akiha), a cat-eared maid and pivotal supporting character, in the science fiction visual novel Steins;Gate for PC originated the role later adapted into anime; she reprised it in expansions like STEINS;GATE Hiyoku Renri no Darling (2011, PC), STEINS;GATE: Senkei Kousoku no Phenogram (2013, PC), STEINS;GATE 0 (2015, PC/PlayStation 4), and Steins;Gate Elite (2018, multi-platform). Later highlights include Kokomo in the 2011 real-time strategy game New Little King's Story for PlayStation Vita, a whimsical advisor to the protagonist, and Momo Kanda/Wonder Momo, a guest fighter and energetic heroine, in the 2011 action RPG Queen's Gate: Spiral Chaos for PlayStation Portable. In 2012, she provided additional voices for the massively multiplayer online RPG Phantasy Star Online 2 across PC and consoles.

Tokusatsu and live-action

Haruko Momoi expanded her performance career into and live-action media, demonstrating her range beyond in through vocal contributions, character voicing, and on-screen cameos. Her most prominent involvement came with the parody series Hikonin Sentai Akibaranger, where she integrated her musical talents with acting elements. In the 2012 series Hikonin Sentai Akibaranger, Momoi voiced the mascot-like antagonist Yuru-Chara Jigen across multiple episodes and appeared as herself in a cameo in episode 9, portraying a victim of the monster Asakusa Alpaca's attack alongside singer Yukio Yamagata. She also performed and co-composed the opening theme "Hikounin Sentai Akibaranger" featuring Yamagata, blending her songwriting with the show's otaku-themed narrative. This role highlighted her ability to contribute to live-action production in both auditory and visual capacities. Momoi reprised her contributions in the 2013 sequel Hikonin Sentai Akibaranger Season Tsuu, again voicing Yuru-Chara Jigen in episode 6 and making a guest appearance as herself in episode 10. She continued providing theme songs for the season, including the opening track, further embedding her musical style into the tokusatsu format. Beyond tokusatsu, Momoi made minor live-action appearances in other Japanese television productions. In the 2016 drama adaptation Yowamushi Pedal, she provided the voice for an alarm clock in episode 1, adding a whimsical touch to the sports-themed series. Earlier, in 2005, she appeared as a guest on the music variety program J-Melo (episode 576), showcasing her singing in a broadcast setting. These roles underscore her adaptability in live-action contexts, often tying into her vocal and performative strengths.

Drama CDs and other media

Haruko Momoi has contributed to numerous drama CDs, often reprising roles from and adaptations in audio-only formats. These works typically feature scripted narratives, character interactions, and sometimes original stories expanding on source material. Her performances in these audio dramas highlight her versatility in portraying energetic, youthful characters. Notable drama CD roles include Ai Hayakawa in Final Fantasy: Unlimited Before (2002) and Final Fantasy: Unlimited After 2 (2003), where she voiced the young protagonist in prequel and sequel audio stories tied to the series. In the Ai Yori Aoshi series, she provided the voice for Chika Minazuki across multiple releases, such as Ai Yori Aoshi Indigo Blue Theater (2002) and Ai Yori Aoshi Enishi Drama CD (2004), depicting the character's lively antics in side stories focused on summer vacations and ensemble dynamics. Momoi also starred as Anise Tatlin in several Tales of the Abyss drama CDs, including Anthology Drama CD Vol.1 (2006) and Anime Drama CD series (2006–2007), which explored alternate scenarios and character backstories from the video game and . In Prism Ark Drama CD: Sister Hell Prism Transformation (2008), she voiced , contributing to a fantastical narrative involving magical sisters in a comedic, action-oriented audio play. For Seto no Hanayome: Seto Inland Gaiden - Koi no Yūnagi-hen (2024), a drama CD adaptation of the , she reprised her role as San Seto in a romance-focused side story. More recent contributions encompass original productions, such as Iiyama Momoka in Uchi no Iryō ga Sekai o Shōaku shite Iru! (2024), a comedic audio drama about a world-conquering freeloader. Additionally, she voiced Enril in Z/X -Zillions of enemy X- NF Drama CD 23: Creepy TRY Angle (2024), part of an ongoing card game adaptation series featuring strategic battles and character-driven plots. Beyond drama CDs, Momoi's work extends to other niche media. She appeared as herself in a cameo in the live-action tokusatsu series Unofficial Sentai Akibaranger (episode 9, 2012), blending her real-life persona with the show's meta-superhero parody. In promotional contexts, she provided narration for the commercial video for her album Sunday Early Morning (2008), voicing a character in a short animated segment advertising the game-inspired track "Thunder Shot! MK.II."
TitleRoleYearSource
Final Fantasy: Unlimited BeforeAi Hayakawa2002ANN
Final Fantasy: Unlimited After 2Ai Hayakawa2003ANN
Indigo Blue TheaterChika Minazuki2002VGMdb
Enishi Drama CDChika Minazuki2004VGMdb
Anthology Drama CD Vol.1Anise Tatlin2006VGMdb
Anime Drama CDAnise Tatlin2006–2007CDJapan
Prism Ark Drama CD: Sister Hell Prism TransformationFilia2008CDJapan
Seto no Hanayome: Seto Inland GaidenSan Seto2024Amazon
Uchi no Iryō ga Sekai o Shōaku shite Iru!Iiyama Momoka2024Official Site
NF Drama CD 23Enril2024Official Site

Discography

Singles

Haruko Momoi's singles discography reflects her evolution as a singer in the , , and scenes, beginning with independent releases and progressing to tie-ins with media projects. Many of her singles were issued as maxi-singles on CD, featuring the lead track as the A-side, often accompanied by B-sides, instrumentals, or remixes, with digital formats becoming more common in later years. While some achieved minor chart success on , particularly those tied to popular series, most early and indie releases did not enter major charts. The following table catalogs her standalone singles chronologically, focusing on verified releases.
Release DateTitleLabelCatalog NumberKey TracksFormat
1997-12-24Dennou Shoujo BaachariankoIndependentN/AA-side: Dennou Shoujo BaachariankoCD, Single
2000-05-24Mail MeKing RecordsKICA-1233A-side: Mail MeCD, Maxi-Single
2002-08-09Love Kero Panic!LantisPLT-002A-side: Love Kero Panic!CD, Single
2002-12-27Sweet Legacy Boku to Kanojo no Na mo Nai Okashi Release Commemoration DiscFrontwingFWD-00028A-side: Sweet Legacy theme songsCD, EP
2003-03-07Sweet Legacy Vocal Song Re:Mix+FrontwingFWD-00033A-side: Sweet Legacy Re:Mix tracksCD, Single
2005-05-04Hide and SeekLantisNKCM-1003A-side: Hide and Seek; B-side: N/ACD, Single
2005-07-27Ton Dol Baby (トンドルベイビー)Mellow HeadLHCM-1013A-side: Ton Dol Baby; B-side: N/ACD, Maxi-Single
2005-10-19Wonder Momo-i New RecordingColumbia Music EntertainmentCOCC-15804A-side: Wonder Momo-i; B-side: N/ACD, Maxi-Single
2005-11-23Akihabalove (with Perfume)NAKiDNKCM-1006A-side: Akihabalove; B-side: N/ACD + DVD
2006-05-04Mebius RingDream PartyDP0005A-side: Mebius Ring; B-side: N/ACD, Single
2006-11-08Saigo no Rock (さいごのろっく)LantisLACA-5875A-side: Saigo no Rock; B-side: N/ACD, Maxi-Single
2006-12-07Yume no BotanIndependentN/AA-side: Yume no BotanCD, Single
2006-12-27Enter!IndependentN/AA-side: Enter!CD, Single
2007-03-2821st CenturyAvex TraxAVCA-26194A-side: 21st Century; B-side: N/ACD + DVD
2007-11-14Hai Energy (ハイ・エナジー) (with Sakura Nogawa)Avex EntertainmentAVCA-26561A-side: Hai Energy; B-side: N/ACD, Single
2007-11-14Rumika (ルミカ)AvexAVCA-26537A-side: Rumika; B-side: N/ACD, Single
2008-08-27Feel so Easy!AvexAVCA-26889A-side: Feel so Easy!; B-side: N/ACD, Single
2009-04-29Ruji GujiIndependentN/AA-side: Ruji GujiCD, Single
2011-03-02Yoake no SambaIndependentN/AA-side: Yoake no SambaCD, Single
2012-04-25Hikounin Sentai Akibaranger (非公認戦隊アキバレンジャー) (feat. Yukio Yamagata)Nippon ColumbiaCOCC-16588A-side: Hikounin Sentai Akibaranger; B-side: Machine Itassha!CD, Maxi-Single
2017-06-07Junai Marionette (純愛マリオネット)Tokyo ToricoPOCS-1590A-side: Junai Marionette; B-side: N/ACD, Maxi-Single
2017-11-08Hoshizora Dancing (星空ダンシング)Tokyo ToricoPOCS-1656A-side: Hoshizora Dancing; B-side: N/ACD, Maxi-Single
2025-10-14NewGame+5pb. RecordsFPBM-0005A-side: NewGame+; Other tracks: NANIKA, 転売ヤーをぶっとばせ！, LOVE.EXE -TENSEI Ver.-, off-vocalsCD, Maxi-Single; Digital

Albums

Haruko Momoi's full-length albums span a range of styles, from compilation collections of her early anime-tied singles to self-produced works emphasizing personal themes like , , and retro influences. Her releases reflect a transition from major labels like Avex to independent outlets after , allowing greater creative control and self-composition. The debut album momo-i quality Best of Momo-i (Avex Mode, 2006) is a 13-track compilation of her initial singles, featuring remixed versions of notable songs such as the upbeat "LOVE.EXE" and the self-composed "Koi no Recipe" (lyrics and music by Momoi). This release established her signature energetic sound with anime-inspired elements. Sunday early morning (Avex Trax, 2008) contains 12 tracks, including the title song "Sunday Early Morning" and "21 Seiki," blending pop with reflective themes of everyday life and urban survival. It highlights Momoi's vocal versatility and includes self-penned lyrics in several cuts. Henji ga Nai, Tada no Shitsuren no You da. (Independent, 2009) is a 12-track album focusing on emotional themes. IVY Aibii (AKIHABA LOVE RECORDS, 2010) offers 12 tracks centered on themes of growth and emotional resilience, with the title track "IVY Aibii" (arranged by Tatsuya Furukawa) as a standout self-composed piece showcasing her maturing songwriting. Notable inclusions like "Kiss! Kiss! Kiss!" add playful energy. Showa (Independent, 2011) is a 12-track exploration of retro Showa-era aesthetics mixed with modern pop, featuring self-composed tracks like the nostalgic title song and "Victory no On'na Neshin☆," which served as an for a Nico Nico video special. This album bridges her roots with historical cultural nods. After leaving major labels, Momoi's independent era began with 'Angya' Momo-i's World Tour (Akihabara Love Records, 2012), a 14-track live-inspired album capturing her global touring experiences, with highlights including energetic performances of "Angya" and self-written travel-themed songs reflecting pilgrimage motifs. STAY GOLD (Tokyo Torico, 2015), her first fully independent full-length release, comprises 10 tracks like the uplifting "Kaito" and "Tsuki ni Mukatte, Ute!," many self-composed by Momoi, emphasizing perseverance and golden-age post-label . This album marked a creative rebirth with raw production. Later works include the self-cover compilation Pink Hippo Album Self Cover Best (Tokyo Torico, 2016), reinterpreting 14 past tracks with fresh arrangements, and Pearl (Tokyo Torico, 2018), a 12-track original effort featuring songs like "Junai Marionette" and "Back to the 80's," drawing on influences and personal reflection. These releases underscore her ongoing commitment to self-expression in . Additional notable albums include Famison 8BIT (Avex, 2007) and Famison 8BIT STAGE2 (Avex, 2007), chiptune-inspired works.

Character songs and ties-ins

Haruko Momoi has contributed numerous character songs to and adaptations, often performing as the voice actress for the associated characters. These releases typically feature upbeat, energetic tracks that reflect the personality of the roles she portrays, blending her singing talents with her work. Many of these songs were issued as part of dedicated character song albums or drama CDs, providing fans with musical insights into the characters' worlds. One of her prominent character song contributions is for the role of Sun Seto in the 2007 anime Seto no Hanayome (My Bride is a Mermaid). As Sun Seto, Momoi performed the single "Brand-new mind," which serves as the character's image song, emphasizing themes of determination and affection with a lively pop arrangement. The track was released on the album Seto no Hanayome Character Song 1 Brand-new mind / Sun Seto (AVCA-26332) on November 21, 2007. Additionally, she sang "Eiyū no Uta" (Song of the Hero) on the same album, capturing Sun's heroic and romantic traits through dynamic vocals and orchestral elements. In the 2003 anime , Momoi voiced the energetic and contributed "Maho-Sho-Jo ☆ Miitan Visit!" to the Popotan Character Song - It's PoPo Time! album (LACA-5216), released on August 27, 2003. This track highlights Mii's playful and magical persona with whimsical lyrics and a catchy melody, co-produced by her group UNDER17. The album also includes group performances tying into the series' themes, such as the ending song "Kotae - Answer," where Momoi's vocals add to the nostalgic tone. For (2011), Momoi reprised her role as Faris NyanNyan in the audio drama series, performing the character song "Nyan☆Nyan☆Galaxy!" on Steins;Gate Audio Series Laboratory Member 007 Faris NyanNyan (ZZCD-56), released on August 24, 2011. The song embodies Faris's cat-like, cheerful demeanor with repetitive "nyan" motifs and electronic pop styling, composed to fit the series' sci-fi aesthetic. Lyrics were written by Momoi herself, showcasing her dual role as performer and creator. Momoi's involvement with UNDER17 also led to several tie-in covers and group performances. For instance, the duo covered "Ai no Medicine" from Nurse Witch Komugi-chan (2002), where Momoi voiced the lead character Komugi Nakahara; this anisong version appeared on various compilation releases and live performances, blending rock elements with the original's idol style. Similarly, Afilia Saga, the group Momoi founded in 2010, released anime song covers like "Popotan Hatake de Tsukamaete" in 2012 as part of their tribute albums, maintaining her connection to character-driven music without direct solo credits. These tie-ins often appeared in formats like CDs and event singles, extending her influence in the anisong scene.

Other releases

In 2007, Momoi released the two-part autobiographical DVD drama Haruko UP DATE, which chronicles her personal and professional journey as an emerging artist in . Part 1, a including a bonus CD, runs for 42 minutes and focuses on her early career aspirations and street performances, while Part 2 extends the narrative to her rising fame and challenges in the entertainment industry. That same year, she issued the live concert DVD Momo-i Up Date Tour Final, capturing performances from her 2006 tour and highlighting her energetic stage presence with hits like "Tondoru Baby." Additionally, Haruko UP DATE: Songs Best, a CD+DVD bundle, featured music videos and themes tied to the drama series, blending her vocal tracks with visual storytelling. Momoi also published her autobiography Aki Haba LOVE: Akihabara to Issho ni Otona ni Natta in January 2007, a book detailing her growth alongside 's otaku culture, from street singing to her breakthrough as the "Akihabara Queen." The work emphasizes personal anecdotes about her life experiences and the subculture that shaped her career.

Other activities

Radio and narration

Haruko Momoi has been active as a since the early 2000s, hosting and co-hosting various programs on networks including Culture Broadcasting, , and TBS Radio, often blending her voice acting persona with Akihabara-inspired themes and tie-ins. Her shows typically aired weekly in late-night slots, engaging listeners through listener mail segments, music commentary, and guest interviews with fellow and musicians. One of her notable early collaborations was Ono-saka・Momoi no Virtual Radio Denno Momon-gā in 2001, co-hosted with voice actor Onosaka Atsushi on Culture Broadcasting, which evolved into Ono-saka・Momoi・Momoko no Denno Momon-gā W and focused on and discussions. In the mid-2000s, Momoi launched solo-hosted programs that highlighted her energetic style and connection to culture, such as Kageyama ☆ Momoi no Baisoku Moe-Chan Neru (2000s), co-hosted with singer on Radio and TBS Radio, emphasizing high-speed "moe" (adorable) content and live event promotions. Her flagship solo show, Momoi Haruko no Chou! Momo-i!, ran from October 2006 to March 2009 on Culture Broadcasting, spanning over 100 episodes with segments like listener quizzes and song covers, culminating in a special ending broadcast that reflected on its impact on her fanbase. Later programs like avex presents Momoi Haruko no Nico Nico RADIO (2009–2010s) and THE WORKS on FM NACK5 continued this tradition, incorporating web radio elements for broader accessibility during the and , with THE WORKS ending in February 2024. As of 2025, Momoi hosts ongoing programs including 桃井はるこのはいはいラジオラジオ on Culture Broadcasting and エレうた! on Radio 1. These shows often featured brief musical performances, tying into her singing career without overshadowing the talk format. Beyond radio, Momoi has undertaken narration duties for commercials and anime series, showcasing her versatile voice in promotional and supportive roles. She provided voice-overs for TV commercials such as the "Amino Supli" Kirin Sentai Aminonjā campaign for Kirin Beverage in the 2000s and the "Pokémon Bread" ad for Daiichi Pan. In 2025, she serves as the regular narrator for the TV anime Neko no Kurachan Ordinary Days, delivering episode intros and outros to enhance its whimsical storytelling. Her narration work extends to event MCing, where she has emceed anime-related live broadcasts and promotions, maintaining her signature upbeat delivery.

Publications and events

Haruko Momoi contributed to several magazines through serialized columns that explored culture, technology, and personal insights from her experiences in and the entertainment industry. In the early , she wrote "桃井はるこ新聞" (Momoi Haruko Newspaper), a regular feature in Monthly ASCII, where she discussed topics ranging from trends to interviews with emerging creators in and gaming. These columns highlighted her early involvement in , drawing from her high school blogging that initially caught the attention of magazine editors. Additionally, Momoi penned "桃井はるこのモモイズム" (Momoi Haruko's Momoi-ism) for Dengeki Moe Oh, focusing on moe aesthetics, idol culture, and 's evolving scene, which resonated with fans of and visual novels. As a , Momoi co-founded and oversaw Afilia Saga (initially Afilia Saga East), an all-female idol group blending -inspired performances with live , often staging events in to engage local communities. She collaborated with producer Chiyomaru Shikura to organize debut showcases, such as the launch event at Toranoana in Akihabara, featuring mini-lives, talks, and fan interactions to build grassroots popularity. Subsequent productions included store-based promotions at venues like Ishimaru Soft in Akihabara, where the group performed singles like "ニーハイ・エゴイスト" over multi-day runs, emphasizing high-energy, themed choreography tied to anime tropes. Momoi's hands-on role extended to coordinating these domestic events, fostering Afilia Saga's reputation as an "Akiba-kei" act through accessible, fan-focused gatherings. Momoi also produced her own personal concerts in , leveraging the district's cultural hubs for intimate performances that showcased her singing and production style. Early street performances in the late evolved into structured live shows at local venues, where she incorporated elements like and interactive segments, solidifying her nickname as the "Queen of ." These events often featured original compositions and ties to her voice acting roles, drawing crowds for their blend of music and narrative flair without relying on larger conventions.

Convention appearances

Haruko Momoi has been a prominent guest at numerous and pop culture conventions worldwide, particularly during the and , where she participated in concerts, panels, sessions, and fan interactions. Known for her energetic performances and engagement with international audiences, she traveled extensively to promote her and , visiting over 15 countries and completing 36 international trips between 2005 and 2013. These appearances helped expand her fanbase beyond , fostering a dedicated global community that often attends her domestic events. In the United States, Momoi made several high-profile appearances, including at in 2009, where she performed live sets featuring songs like "LOVE.EXE," drawing large crowds for her Akihabara-inspired shows. She returned for autograph signings and panels at 2010 and 2011, emphasizing fan Q&A sessions on her creative process. At 2007 in , she headlined a concert but faced scheduling issues that led to a partial cancellation, yet still connected with attendees through impromptu interactions. Later U.S. events included Anison USA in 2016, 2017, and 2019 in locations like and , where she focused on vocal performances and discussions about anime music. Momoi's European engagements highlighted her appeal in the continent's growing scene. In , she performed at Connichi 2007 in , delivering live renditions of tracks like "Romantic Summer" from Seto no Hanayome, and returned in 2010 for additional concerts at the same event. At AyaCon (Aya Revolution) 2009 in the United Kingdom, she entertained fans with covers such as "God Knows" from The Melancholy of during her set, alongside panels on . In , she served as Guest of Honor at Desucon 2010 in , participating in events, artist alleys, and a dedicated concert that celebrated Japanese pop culture. Her 2011 appearance at J-FEST in , , marked her first live concert there, featuring performances and fan meet-and-greets that resonated with Eastern European audiences. In North and Central America, Momoi engaged with diverse fan communities through multiple visits to and . At 2008 in , she combined musical performances with panels, attracting attendees interested in her roles in series like . In , she appeared at Expo-TNT 2011 (both February and April editions) in , where she held concerts and autograph sessions, and earlier at Expo Comic 2009, performing hits like "WONDER MOMO-i" to enthusiastic local crowds. These events often included promotions for her group Afilia Saga, blending idol performances with interactive elements. Following 2019, Momoi's international convention schedule saw a hiatus, with no confirmed international in-person appearances through 2025 amid global events like the , though she maintained fan engagement via online streams and continued domestic live performances, including concerts at Duo Music Exchange in May 2025 and ANISONIC# SP!! in October 2025. Her upcoming role as a guest at 2026 signals a potential return, promising renewed concerts and panels for her enduring global supporters. This period of reduced international travel underscored the lasting impact of her earlier tours, which solidified her status as a bridge between culture and worldwide enthusiasts.

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