Kamikaze Girls (Japanese: 下妻物語　ヤンキーちゃんとロリータちゃん, Hepburn: Shimotsuma Monogatari: Yankī-chan to Rorīta-chan; lit. "Shimotsuma Story: Delinquent Girl and Lolita Girl"), is a 2002 Japanese novel written by Novala Takemoto. The story centers on the unlikely friendship between Momoko Ryugasaki, a "Rococophile" and Lolita, and Ichigo "Ichiko" Shirayuri, a yankī (juvenile delinquent).

A live-action film adaptation was released on May 13, 2004. In the same year, a manga adaptation by Yukio Kanesada [ja] was serialized in Betsucomi. Viz Media licensed the novel for an English-language release in North America in 2006.

Momoko Ryugasaki is a high school student who admires the Rococo style and Lolita fashion. In contrast to her idyllic lifestyle, she is forced to flee her hometown Amagasaki to live in her grandmother's house in Shimotsuma, Ibaraki Prefecture, after her father, a former yakuza member, ran into legal trouble from selling counterfeit Versace apparel. Initially, Momoko is excited to move closer to Tokyo, where her favorite clothing brand Baby, the Stars Shine Bright is located, but she is dismayed at discovering Shimotsuma is a rural, countryside town. When she runs out of spending money, she resorts to selling her father's remaining merchandise. Ichigo Shirayuri, a member of the all-female biker gang Ponytails who goes by the name "Ichiko", visits Momoko frequently to purchase clothing for her gang. Despite their opposite personalities and interests, the girls develop an unlikely friendship.

When Momoko runs out of merchandise to sell, Ichigo takes her to pachinko parlors for more spending money. Momoko hits the jackpot, which draws the attention from the manager, but Ryuji comes to their defense. Ichigo falls in love with him, but she learns that he is the fiancé of Akimi, the Ponytails' leader. When Momoko tells Ichigo about her day trips to visit the Baby, the Stars Shine Bright store in Tokyo, Ichigo mentions that she would like to visit Emma, an embroidery service located in the same area, as she plans on getting her kamikaze coat embroidered to honor Akimi's marriage and retirement from the Ponytails. When the two visit Tokyo, Momoko's embroidery work catches the attention of Akinori Isobe, the founder of Baby, the Stars Shine Bright. Meanwhile, to Ichigo's disappointment, Emma has permanently closed, but Momoko offers to embroider her jacket instead.

Isobe later contacts Momoko and commissions her to embroider a jumper skirt for the store's display. She completes the embroidery on both the jumper skirt and Ichigo's jacket in three days. While visiting Baby, the Stars Shine Bright to drop off the jumper skirt, Ichigo is asked to model for the brand's catalog after one of their models is injured. At Isobe's advice, Ichigo pursues a part-time modeling career. Momoko, on the other hand, turns down Isobe's suggestion to work for Baby, the Stars Shine Bright but decides to become Ichigo's manager.

Under Miko's new leadership, the Ponytails are unhappy with Ichigo becoming a model. Likewise, Ichigo is unsatisfied with the direction of the Ponytails and decides to quit the gang. As punishment for deserting the Ponytails, they challenge her to a fight, which Momoko overhears Ichigo accepting over the phone. Concerned for Ichigo, Momoko locates their fight and causes the Ponytails to flee by throwing her grandmother's scooter and water balloons at them. The two girls ride home on Ichigo's motorbike.

Kamikaze Girls is written by Novala Takemoto. It is published by Shogakukan. In 2004, the novel was re-released in bunkoban paperback format. He followed up with a sequel, titled Shimotsuma Monogatari: Kan: Yankī-chan to Rorīta-chan to Satsujin Jijō in 2005. An audiobook of the second volume, narrated by Ayu Shoji, was released on April 23, 2025.

Viz Media licensed the first novel for English-language distribution in North America. They re-released the novel in 2008.