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.
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.
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.
- 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.