Founded by Kamogawa Genji years after his retirement, the gym is two stories with a basement. The first floor and basement serve as training areas while the second floor contains Kamogawa's office. Both the first floor and basement also contain boxing rings in them.
By the start of the series, the gym had produced two Japanese champions and one OPBF champion (Miyata's father). At present, one member holds a championship: Takamura Mamoru (WBC & WBA Middleweight). Previously Makunouchi Ippo was the JBC Featherweight champion.It is a highly respected gym and has become well known for its strict training. At present, there are roughly 20-30 members of the gym. Nekota Ginpachi once served as a volunteer trainer during a 3 week period.
- Miyata (trainer; now affiliated with Kawahara Boxing Gym)
- Umezawa Masahiko (merchandise designing; now an assistant manga artist)
- Takamura Mamoru
- Aoki Masaru
- Kimura Tatsuya
- Makunouchi Ippo
- Itagaki Manabu
- Akamatsu Isamu
- Kizakura Hiroshi
- Baron Kurita (currently a free trainer)
- Miyata Ichirou (now affiliated with Kawahara Boxing Gym)
- Yamada Naomichi (now affiliated with Hachinoe Kentou-kai)
- Otowa coach (who wears sunglasses and was seen as a second for Miyata's father, during the match with Randy Boy Sr.)
- The brand of boxing gear officially used by the Kamogawa crew is called "Winning" gear, which is a real-life brand of boxing gear. The difference is that the two blue lines and red triangle logo on a Winning glove are reversed, to avoid copyright infringement.