K-1 WORLD GP 2017, which will determine the first lightweight champion. In addition to Okube Koya, who won the world's strongest tournament in September 2016, four representatives of Japan and powerful overseas players gathered. They fight a fierce and fierce battle for the crown.

The K-1 WORLD GP 2021 JAPAN ～よこはまつり～ takes place on September 20, 2021, at Yokohama Arena in Yokohama, Japan. This kickboxing event features Kenta Hayashi facing Daizo Sasaki in a super lightweight bout as a key matchup. Other fighters include Rukiya Anpo, Sina Karimian, and Hirotaka Asahisa across various weight classes. A special heavyweight bout marks Satoshi Ishii’s kickboxing debut against Ryo Aitaka.