The B1 League is the premier professional basketball league in Japan, representing the pinnacle of the sport in the country. Formed in 2016 through the merger of the former BJ League and NBL, it has quickly established itself as a major force in Asian basketball. The league is headquartered in Tokyo and operates a sophisticated structure across three divisions: B1, B2, and B3, with promotion and relegation linking them. The B1 League regular season features 24 teams split into two conferences, playing a extensive schedule. The top teams from each conference then advance to a playoff tournament, culminating in a championship final series. The league has significantly increased its star power and commercial reach, attracting high-profile imports and former NBA players, while also developing Japanese talent for the national team. Its influence continues to grow both domestically and across the Asia-Pacific region. Key annual awards include the Regular Season MVP, the Best Five Team, and the Finals MVP, celebrating excellence throughout the campaign.