Japanese Basketball League (B3 League) History
League status
The B3 League (JBL2) is the third-tier basketball league in Japan. B3 League was established in 2007.
The B3 League sits above the University League which effectively forms the fourth-tier of Japanese basketball.
At the end of regular season, top 8 teams qualify to the play-offs.
League name history
2007-2013: JBL 2 division
2013-2016: National Basketball Development League
2016[+] until now: B3 League 2016-2017 2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2023-2024 2024-2025
League logos
 2007-2016 |  Since 2016 |
Title holders
Championships by club
| Titles | Club | Years |
|---|---|---|
| 1 |  Iwate | 2022-23 |
| 1 |  Yokohama EX | 2024-25 |
| 1 |  Fukui B. | 2023-24 |
Finals year-by-year
| Season | Winner | Result | Finalist | Regular Season Champ |
|---|---|---|---|---|
| 2022-23 | Iwate Big Bulls | 2-1 |  Shizuoka Veltex | Iwate Big Bulls |
| 2023-24 | Fukui Blowinds | 2-0 |  Kagoshima Rebnise | Fukui Blowinds |
| 2024-25 | Yokohama Excellence | 2-0 |  Earthfriends Tokyo Z | Yokohama Excellence |
Finals participants
| Club | W | L | Total |
|---|---|---|---|
| Iwate | 1 | 0 | 1 |
| Kagoshima | 0 | 1 | 1 |
| Yokohama EX | 1 | 0 | 1 |
| Tokyo Z | 0 | 1 | 1 |
| Shizuoka | 0 | 1 | 1 |
| Fukui B. | 1 | 0 | 1 |
Final Four participants
| Club | 1st | 2nd | 3rd | 4th |
|---|---|---|---|---|
| Iwate | 1 | 0 | 1 | 0 |
| Yokohama EX | 1 | 0 | 1 | 0 |
| Fukui B. | 1 | 0 | 0 | 0 |
| Shizuoka | 0 | 1 | 0 | 0 |
| Kagoshima | 0 | 1 | 0 | 0 |
| Tokyo Z | 0 | 1 | 0 | 0 |
 Kagawa FA | 0 | 0 | 1 | 0 |
 Saitama | 0 | 0 | 0 | 1 |
 Tokushima Gam. | 0 | 0 | 0 | 1 |
 Niigata A. | 0 | 0 | 0 | 1 |
Players with the most appearances in the Japanese Finals
| Player | Finals Appearances | Years |
|---|---|---|
| Jun Taniguchi | 2 | 2023, 2025 |
| Logan Routt | 2 | 2024, 2025 |
| Tray Boyd III | 2 | 2024, 2025 |
Players with the most Japanese titles
| Player | Count | Years Won |
|---|---|---|
| Jun Taniguchi | 2 | 2023, 2025 |
| Tray Boyd III | 2 | 2024, 2025 |
| Takumi Masuko | 2 | 2025, 2025 |
