
Basketball leagues are professional basketball competitions where teams compete against each other. The National Basketball Association (NBA) is the most well-known basketball league, with 30 teams (29 in the US and 1 in Canada) competing annually for the league championship. The NBA was formed in 1949 through a merger between the Basketball Association of America (BAA) and the National Basketball League (NBL). Other notable basketball leagues include the B.League in Japan, which was formed through a merger between the Japan Basketball League and the bj league, and the National Basketball League in Australia, which has a partnership with the B.League. These leagues typically have a regular season followed by playoffs, with the teams competing to reach the championship finals.
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What You'll Learn

The National Basketball Association (NBA)
The NBA's regular season runs from October to April, with each team playing 82 games. The league's playoff tournament extends into June, culminating in the NBA Finals championship series. The Boston Celtics have won the most NBA championships (18), with the Los Angeles Lakers close behind with 17.
The NBA expanded to Canada in 1995 with the addition of the Vancouver Grizzlies and the Toronto Raptors. In 1996, the NBA created a women's league, the Women's National Basketball Association (WNBA). The NBA's first season featured 17 franchises located in a mix of large and small cities, as well as large arenas and smaller gymnasiums. The league continued to evolve, with teams relocating and the addition of expansion franchises.
The NBA has two conferences, Eastern and Western, with each conference consisting of three divisions. The NBA is an active member of USA Basketball (USAB), recognised by the International Basketball Federation (FIBA) as the governing body for basketball in the United States.
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NBA players are the highest-paid athletes
The National Basketball Association (NBA) is a professional basketball league in North America, composed of 30 teams (29 in the US and 1 in Canada). The NBA is considered the premier professional basketball league in the world and is one of the major professional sports leagues in the US and Canada. The league is headquartered in Midtown Manhattan, New York.
The NBA was created on 3 August 1949, with the merger of the Basketball Association of America (BAA) and the National Basketball League (NBL). The BAA was founded in 1946 by owners of major ice hockey arenas in the US and Canada. The NBA considers its founding date to be 6 June 1946, which was when the BAA was founded.
The NBA's regular season runs from October to April, with each team playing 82 games. Two teams of 5 players play on a rectangular court, and the object of the game is to shoot a ball into a hoop mounted on a backboard to score points. Shots made from the hoop up to the "three-point line" count for 2 points, and shots made from beyond the three-point line count for 3 points. The ball can also be dunked into the basket for 2 points.
There are several exceptions to the salary cap in the NBA. The Larry Bird exception, or Bird Rights, allows teams to re-sign a current player if they have played for that team for at least three years. The mid-level exception allows teams that are over the salary cap to sign one or more players as long as they do not exceed the average NBA salary. The bi-annual exception can be used every other year to sign a free agent for up to two years at an NBA-set amount. The rookie player exception allows any team to sign their first-round draft pick to a contract based on an NBA-set scale.
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The B. League in Japan
The B.League, or Japan B League 1, is a men's professional basketball league in Japan. It is the premier professional basketball league in the country, showcasing the top talent and thrilling competition. The league is operated by the Japan Professional Basketball League and was formed following a merger between the National Basketball League (operated by the FIBA-affiliated Japan Basketball Association) and the independently operated bj-league.
The Japan Basketball Association was formed in 1930 and has operated Japan's top basketball leagues under various names since 1967. Historically, teams have been affiliated with large corporations, and players have been employed by their respective owner companies rather than competing as professional basketball players. In 1997, the ban on professional players was lifted, but the structure of the Japan Super League remained amateur in nature, with most teams still controlled by corporate sponsors. In 2005, the rival bj-league was launched, based on an American franchise system of professional teams. This prompted the JBA to relaunch the Super League as the Japan Basketball League (JBL) in 2007, but the competition still featured a mixture of professional and corporate teams.
The B.League was established in 2016, with 45 teams participating and divided into three divisions. The league has since been reformatted to feature two conferences, East and West, in the first and second divisions. However, the first division reverted to a three-conference system (East, Central, and West) for the 2022-23 season. The B.League has quickly gained recognition for its high level of play, passionate fan base, and commitment to promoting basketball across Japan.
The B.League's inaugural season commenced on September 22, 2016, with an inaugural match between four-time JBL/NBL champions Alvark Tokyo and four-time bj-league champions Ryukyu Golden Kings. Since the 2021-22 season, the winners and runners-up of each season qualify for the East Asia Super League.
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Promotion and relegation in the B. League
Basketball leagues typically use a promotion and relegation system, where teams can move up and down divisions based on their performance over a season. The B.League, a men's professional basketball league in Japan, is no exception. It holds promotion-relegation playoffs each year to determine which second division teams will be promoted to the first division and vice versa for the following season.
The B.League consists of two divisions, B1 and B2, which are further divided into two conferences each: East and West. In the 2022–23 season, B1 had 24 teams, and B2 had 14. Each team in B1 plays a 60-game regular season schedule, consisting of 36 games against teams within their conference and 24 games against teams in the other conference. Eight teams then qualify for the playoffs, including the top three teams from each conference and the next two teams with the best records, regardless of their conference.
For the 2020–21 season, the B.League announced that the top two teams from B2 would be automatically promoted to B1, with no other promotions or relegations taking place. This was also the season when the B.League was reformatted to have two conferences each in the first and second divisions, East and West, before B1 reverted to a three-conference system (East, Central, and West) in the 2022–23 season.
The B.League was formed in 2016 as a result of a merger between the National Basketball League (NBL), operated by the Japan Basketball Association (JBA), and the independently operated bj league. The merger was mandated by the FIBA, the international governing body for basketball, as a condition for Japan to resume its FIBA membership following its suspension in November 2014.
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The NBA's rival league, the ABA
The NBA is a professional basketball league in North America, composed of 30 teams (29 in the US and 1 in Canada). It was formed in 1949 with the merger of the BAA and the NBL.
The ABA and NBA engaged in a bidding war, with the NBA signing the era's most important college star, Kareem Abdul-Jabbar (then known as Lew Alcindor). The ABA, however, boosted the salaries of both players and referees. In its later years, the ABA saw the rise of stars such as Dan Issel, Artis Gilmore, George Gervin, and Julius Erving.
By the end of the 1975–76 season, the league was down to seven teams, and in 1976, the ABA merged with the NBA, resulting in four teams (Pacers, Nuggets, Spurs, and Nets) joining the NBA. The final ABA championship game was played on May 13, 1976, with the New York Nets defeating the Denver Nuggets.
The ABA was reformed in 2000 in partnership with the NBA and has been operating alongside it since.
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Frequently asked questions
There are 30 teams in the NBA, with 29 in the United States and 1 in Canada.
The NBA's regular season runs from October to April, with each team playing 82 games. The league's playoff tournament extends into June, culminating in the NBA Finals championship series.
The B.League is a men's professional basketball league in Japan, formed from a merger between the National Basketball League and the bj league. It typically holds promotion-relegation playoffs each year to determine which second division teams will be promoted to the first division and vice versa for the following season. The B.League has two conferences, East and West, in the first and second divisions.











































