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

(As of February 1st, 2026)^[2]

#	East Division	GP	W	L	PCT	GB
1	Levanga Hokkaido	35	26	9	.743	—
2	Utsunomiya Brex	35	26	9	.743	—

3	Chiba Jets	35	26	9	.743	—
4	Alvark Tokyo	35	24	11	.686	2
5	Gunma Crane Thunders	35	22	13	.629	4
6	Sendai 89ers	35	21	14	.600	5
7	Sunrockers Shibuya	35	15	20	.429	11
8	Yokohama B-Corsairs	35	13	22	.371	13
9	Koshigaya Alphas	35	13	22	.371	13
10	Altiri Chiba	35	10	25	.286	16
11	Kawasaki Brave Thunders	35	9	26	.257	17
10	Ibaraki Robots	35	9	26	.257	17
13	Akita Northern Happinets	35	7	28	.200	19

#	West Division	GP	W	L	PCT	GB
1	Nagasaki Velca	35	30	5	.857	—
2	Nagoya Diamond Dolphins	35	27	8	.771	3

3	Seahorses Mikawa	35	23	12	.657	7
4	Ryukyu Golden Kings	35	22	13	.629	8
5	Hiroshima Dragonflies	35	19	16	.543	11
6	Saga Ballooners	35	19	16	.543	11
7	Shimane Susanoo Magic	35	19	16	.543	11
8	San-en NeoPhoenix	35	16	19	.457	14
9	Osaka Evessa	35	15	20	.429	15
10	Fighting Eagles Nagoya	35	14	21	.400	16
11	Shiga Lakes	35	12	23	.343	18
12	Kyoto Hannaryz	35	9	26	.257	21
13	Toyama Grouses	35	9	26	.257	21

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
		Final	Win vs. Al Riyadi
	East Asia Super League	Group stage	OT Loss vs. Taipei Fubon Braves	4–2
			Win vs. Seoul SK Knights
			Loss vs. Seoul SK Knights
			Win vs. Hong Kong Eastern
			Win vs. Hong Kong Eastern
			Win vs. Taipei Fubon Braves
		Quarter-finals	March 18th, 2026 vs. New Taipei Kings
Alvark Tokyo		Group stage	Loss vs. Ulaanbaatar Xac Broncos	5–1
			Win vs. New Taipei Kings
			Win vs. Changwon LG Sakers
			Win vs. Changwon LG Sakers
			Win vs. New Taipei Kings
			Win vs. Ulaanbaatar Xac Broncos
		Semi-finals	March 20th, 2026 vs. TBD
Ryukyu Golden Kings		Group stage	Loss vs. Taoyuan Pauian Pilots	5–1
			Win vs. Meralco Bolts
			Win vs. Macau Black Bears
			Win vs. Macau Black Bears
			Win vs. Taoyuan Pauian Pilots
			Win vs. Meralco Bolts
		Semi-finals	March 20th, 2026 vs. TBD

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.
^ "順位表". B.LEAGUE（Bリーグ）公式サイト (in Japanese). Retrieved 2025-12-25.

[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.

[2] "順位表". B.LEAGUE（Bリーグ）公式サイト (in Japanese). Retrieved 2025-12-25.

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