The Kantoh Collegiate American Football Association is an American college football league made up of colleges and universities in the Kanto region of Japan.
The Kanto League is the main university football league in eastern Japan. The league is divided into six divisions.
Under the previous format, the league winners played against teams from western Japan in the Koshien Bowl.
In 2024, the new format allows the top three schools to compete in the Koshien Bowl Tournament.
Other participating schools in the tournament are the top three schools from the Kansai Collegiate American Football League Division 1, and the winners of each league from Tohoku, Hokuriku, and Chugoku-Shikoku.
Prior to the 2014 season, the Kantoh league had two conferences. The winners of each conference would then play in the Azuma Bowl, to determine league champion. Starting in 2014, the league switched to a two division format, the Top 8 and Big 8. With the new format, there would be no championship game and the Top 8 conference would be the highest level of play, making the winner of that division the overall conference champion.
In the 2025 season, Block B will have nine teams, so they will be divided into a first group of five teams and a second group of four teams, and will compete in a first and second league. The first league will be a round-robin format within the group, with the top three schools in Group 1 and the top two schools in Group 2 advancing to the second upper league, and the bottom two schools each moving on to the second lower league.
In addition, the grounds of each university will be used.