Yohei Komatsu (小松 洋平, Komatsu Yōhei) (born June 25, 1988), better known by his ring name Yoh (stylised in all caps), is a Japanese professional wrestler. He is signed to New Japan Pro-Wrestling (NJPW), and is one-third of the current NEVER Openweight 6-Man Tag Team Champions alongside Spiritech tag team partner Master Wato and Toru Yano in their first reign as a team and his second individually.

After returning from his excursion, he was a part of the junior heavyweight tag team Roppongi 3K, along with Sho. The tag team were five-time IWGP Junior Heavyweight Tag Team Champions and three-time winners of the Super Junior Tag League. Additionally, Yoh is a one-time IWGP Junior Heavyweight Tag Team Champion (with Master Wato), a two-time NEVER Openweight 6-Man Tag Team Champion (the first alongside Hirooki Goto and Yoshi-Hashi), and won the Super Junior Tag League with Lio Rush. From 2017 to 2025, Yoh was a member of Chaos.

He has previously also worked for the American promotion Ring of Honor (ROH) and Mexican promotion Consejo Mundial de Lucha Libre (CMLL). In the latter promotion, he was known under the ring name Fujin (風神, Fūjin), named after the Japanese God of the wind, and was part of La Ola Amarilla ("the Yellow Wave") alongside Okumura, Kamaitachi and Raijin (the name Sho worked under in Mexico).

Komatsu was born on June 26, 1988, in Kurihara, Miyagi, Japan where he also grew up. He became interested in professional wrestling by watching it on television with his parents from the age of three. While in school he joined the wrestling club, learning amateur wrestling at a young age.

After graduating from university, Komatsu began training for his professional wrestling career at the New Japan Pro-Wrestling (NJPW) dojo. Initially, he worked a part-time job while trying to pass the NJPW "Young Lions" test, which he finally passed in May 2012.

He made his debut for NJPW on November 19, 2012, on NJPW's NEVER project's Shodai NEVER Musabetsu Kyu Oza Kettei Tournament show where he lost to Takaaki Watanabe. Komatsu competed as one of NJPW's "Young Lions", a class of rookie wrestlers who work mostly against each other early on, wearing all black gear and with no particular ring character, all part of the structured learning process in NJPW. In 2013, he competed in his first major NJPW tournament, teaming up with Kushida to compete in the 2013 Super Junior Tag Tournament. The team lost in the first round to Bushi and Valiente. On January 4, 2014 Komatsu teamed up with Jyushin Thunder Liger, Manabu Nakanishi and Super Strong Machine to work a non-televised match at Wrestle Kingdom 8, NJPW's biggest show of the year. The team lost to Bushi, Captain New Japan, Hiroyoshi Tenzan and Tomoaki Honma. Throughout 2013 and 2014, Komatsu often faced off against fellow Young Lion Sho Tanaka, with both men trading victories in both singles and tag team competition. By 2015, Komatsu and Tanaka had begun teaming together on a regular basis, including working together in the New Japan Rumble as part of Wrestle Kingdom 9 on January 5, 2015. The two teamed up to eliminate Tiger Mask and Taichi but were both eliminated by Tama Tonga. On January 15, 2015, Komatsu competed at the Fantastica Mania 2015 event as he was called upon to replace the injured Rey Cometa in the NJPW/Consejo Mundial de Lucha Libre (CMLL) co-promoted event. The team of Komatsu and Kushida lost to Bárbaro Cavernario and Yoshi-Hashi. On February 11 at The New Beginning in Osaka, Komatsu lost to Tanaka and three days later Komatsu and Satoshi Kojima lost to Captain New Japan and Nakanishi. The Invasion Attack 2015 show saw Komatsu, Alex Shelley, Captain New Japan, Kushida and Yuji Nagata defeated Liger, Nakanishi, Ryusuke Taguchi, Sho Tanaka and Tiger Mask.

He was announced to be one of 16 wrestlers selected to be part of the 2015 Best of the Super Juniors tournament. However, he would go on to lose all his qualifying matches. On July 5, 2015, at Dominion 7.5 in Osaka-jo Hall, Nakanishi, Máscara Dorada, Taguchi, Tanaka and Nagata defeated Hiroyoshi Tenzan, Liger, Kojima, Tiger Mask and Komatsu in the untelevised first match of the night. His next match at a major NJPW show was on September 23, 2015 at Destruction in Okayama where he, Tanaka, Katsuyori Shibata and Nagata defeated David Finlay, Jay White, Nakanishi and Tetsuya Naito. A few days later, at Destruction in Kobe, Komatsu and Tanaka defeated fellow Young Lions Finlay and White. In early 2016, it was announced that Komatsu and Tanaka would compete in the 2016 Fantastica Mania series of shows, competing in what NJPW called the "Yohei Komatsu and Sho Tanaka send-off game", announcing that the two would travel to Mexico and work for CMLL as part of their continued in-ring skill development. The team worked the opening match for each of the six Fantastica Mania events, losing each time. On the last night, Tetsuya Naito, Komatsu's original trainer, called Komatsu to the ring and implied that he was going to join Naito's stable Los Ingobernables de Japón, but then proceeded to beat him up with Evil.

Komatsu and Tanaka would be the latest in a long line of young Japanese wrestlers to travel to Mexico to learn the lucha libre style. In Mexico, Komatsu was given the ring name Fujin, named after the Japanese God of Wind, teaming with Tanaka who would be known as Raijin, named after the Japanese God of Thunder. The duo made their Mexican debut on January 31, teaming up with Okumura, forming the most recent version of La Ola Amarilla ("The Yellow Wave"). The group was joined by Kamaitachi, the previous NJPW trainee who has worked for CMLL since 2014. On March 22, Fujin took part in the 2016 edition of The CMLL Torneo Gran Alternativa, a tournament in which rookies team up with veterans in a single-elimination tournament. Teaming up with Rey Escorpión, Fujin won his block, advancing to the finals of the tournament scheduled for April 5, in which they were defeated in the finals of the tournament by Esfinge and Volador Jr.