Koshigaya Alphas
| Koshigaya Alphas | |||
|---|---|---|---|
 | |||
| Conference | East | ||
| Division | First | ||
| Leagues | B.League | ||
| Founded | 1997 | ||
| History | Otsuka Corporation Alphas (1997–2018) Otsuka Corporation Koshigaya Alphas (2018–2019) Koshigaya Alphas (2019–present) | ||
| Arena | Koshigaya Municipal General Gymnasium | ||
| Capacity | 4,472 | ||
| Location | Koshigaya, Saitama | ||
| General manager | Kazuto Aono | ||
| Head coach | Ryuzo Anzai | ||
| Website | www | ||
|
| |||
The Koshigaya Alphas (越谷アルファーズ, Koshigaya Arufāzu) are a Japanese professional basketball team based in Koshigaya. The team most recently competed in the first division of the B.League. Starting from the 2026–27 season, the team will compete in the B.League One, the league's second division, as a member of the Northern Conference.[1]
Coaches
- Yoshinori Kaneta
- Kenji Okamura
- Kazuto Aono (2013–20)
- Junpei Takahara (2020–21)
- Sho Higashijima (2021–23)
- Ryuzo Anzai (2023–)
Current roster
| Koshigaya Alphas roster | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Players | Coaches | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Updated: 8 April 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notable players
- Ryuzo Anzai
- James Blasczyk
- Luke Evans (fr)
- Takeshi Hasegawa
- Drew Naymick
- Raymond Nixon
- Daisuke Noguchi
- Kenji Okamura
- Daniel Orton
- Kyle Richardson
- Hiroki Sato
- Daisuke Takaoka
- Kenji Yamada
Arenas
- Koshigaya Municipal General Gymnasium
- Brex Arena Utsunomiya
- Saitama Prefectural University
- Dokkyo University
- Bunkyo University
- Wing Hat Kasukabe
- Koshigaya City Minami Gymnasium
- Mainichi Kogyo Arena Kuki
- Gyoda City General Gymnasium
- Kisai General Gymnasium Fuji Arena