Yanaoka (柳岡) is a non-recurring character in Hajime no Ippo.

He is a trainer at Naniwa Kentou-kai and Sendou Takeshi’s second. He was the one who introduced Sendou to the boxing world.

Gender: Male
Birth Date: July 30, 1953
Homeland: Japan Osaka, Japan
Occupation: Naniwa Kentou-kai trainer
Boxer Info
Weight Class: None
Style: Out-Boxer
Date(s) Retired: ca. 1980
Boxing Record
Total Matches: Unknown
Wins: Unknown
Wins by KO: Unknown
Losses: 1 (known)
Manga Debut: N/A
Anime Debut: Has Yet Appeared


Miyata-san Boxer

Yanaoka defeated

Sometime in the past, he became a professional boxer in Japan. During his career he was known to be a really good fighter in the ring, in which eventually he became 1st ranked in JBC, giving him the chance against the National Champion of that time which was Miyata's Father. He ended up losing fiercely by the early rounds.

It is unknown if he retired immediatelly after that or later for another reason, but one thing is certain, he still remembers the feel from being knocked down by him.

After retiring he became a trainer at the Naniwa Kentou-kai, in which he started training new boxers, just like most past fighters. He became a first class trainer and second whose skills are even recognized by Kamogawa Genji after his career.


Early Days Arc

Years later, a few of his trainees got beaten up by a delinquent named Sendou Takeshi (Who Yanaoka almost knocked out). After Sendou took part in another rumble, Yanaoka turned him onto boxing as a way to find the strength he hungers for.

All Japan Rookie King Tournament Arc

He is one of the few people who truly understand Sendou Takeshi.

Lallapallooza Arc

Red Lightning Arc

Battle of the Beasts Arc

Match History

Result Opponent Type Rd., Time Date Location Notes
LOSS Miyata Senior KO Unknown ca. 1980 Japan Unknown


  • Although it is yet to be revealed in the manga, one of the video games lists his full name as Yanaoka Kazuhiro.