2025–26 B1 League season

2025–26 B1 League season
2025–26 B1 League season
League	B1 League
Season	2025–26
Duration	3 October 2025 – May 2026
Teams	26
	← 2024–25 2026–27 →

The 2025–26 B1 League season, also known as the 2025–26 Resona Group B1 League season (Japanese: 2025–26シーズンりそなグループ B1リーグ, Hepburn: 2025–26 Shīzun Resona Group B1 Rīgu) for sponsorship reasons, will be the tenth season of the B1 League, the top Japanese professional basketball league, since its establishment in 2015.

Utsunomiya Brex are the defending champions, having won their third B.League title after defeating the Ryukyu Golden Kings in the 2025 finals.^[1]

Changes from last season

Format

The teams will now be split between two conferences instead of three as in previous seasons.

Team changes

Altiri Chiba and Toyama Grouses were promoted from the B2 League. Relegation from the B1 League was suspended last season as part of the lead up to the upcoming league reformatting.

Teams

Chūkyō

Greater Tokyo

Locations of teams of the 2025–26 B1 League season
Pink: East Division; Yellow: West Division.

Location of teams within Aichi Prefecture, Chūkyō region

Regular season

Standings

#	East Division	GP	W	L	PCT	GB
1	Akita Northern Happinets	0	0	0	–	—
2	Alvark Tokyo	0	0	0	–	—

3	Altiri Chiba	0	0	0	–	—
4	Chiba Jets	0	0	0	–	—
5	Gunma Crane Thunders	0	0	0	–	—
6	Kawasaki Brave Thunders	0	0	0	–	—
7	Koshigaya Alphas	0	0	0	–	—
8	Ibaraki Robots	0	0	0	–	—
9	Levanga Hokkaido	0	0	0	–	—
10	Sendai 89ers	0	0	0	–	—
11	Sunrockers Shibuya	0	0	0	–	—
12	Utsunomiya Brex	0	0	0	–	—
13	Yokohama B-Corsairs	0	0	0	–	—

#	West Division	GP	W	L	PCT	GB
1	Fighting Eagles Nagoya	0	0	0	–	—
2	Hiroshima Dragonflies	0	0	0	–	—

3	Kyoto Hannaryz	0	0	0	–	—
4	Nagasaki Velca	0	0	0	–	—
5	Nagoya Diamond Dolphins	0	0	0	–	—
6	Osaka Evessa	0	0	0	–	—
7	Ryukyu Golden Kings	0	0	0	–	—
8	Saga Ballooners	0	0	0	–	—
9	San-en NeoPhoenix	0	0	0	–	—
10	SeaHorses Mikawa	0	0	0	–	—
11	Shiga Lakes	0	0	0	–	—
12	Shimane Susanoo Magic	0	0	0	–	—
13	Toyama Grouses	0	0	0	–	—

B1 League clubs in Asian competitions

Team	Competition	Progress	Result	W–L
Utsunomiya Brex	Basketball Champions League Asia	Group stage	Loss vs. Meralco Bolts	4–1
		Group stage	Win vs. Shabab Al Ahli
		Quarter-finals	2OT Win vs. Tabiat
		Semi-finals	Win vs. Ulaanbaatar Xac Broncos
		Finals	Win vs. Al Riyadi
	East Asia Super League	Group stage		0–0
Alvark Tokyo		Group stage		0–0
Ryukyu Golden Kings		Group stage		0–0

B1 League clubs in International competitions

Team	Competition	Progress	Result	W–L
Utsunomiya Brex	Intercontinental Cup	Group stage	Loss vs. Unicaja	0–3
		Group stage	Loss vs. Al Ahli Tripoli
		Fifth place	Loss vs. Illawarra Hawks

References

^ Odeven, Ed (2025-05-27). "B.League Finals: Utsunomiya Rallies Past Ryukyu to Capture the Title | JAPAN Forward". japan-forward.com. Retrieved 2025-09-19.

[1] Odeven, Ed (2025-05-27). "B.League Finals: Utsunomiya Rallies Past Ryukyu to Capture the Title | JAPAN Forward". japan-forward.com. Retrieved 2025-09-19.

[1]