K-1 WORLD GP 2018: Featherweight Championship Tournament: The K-1 WORLD GP 2018 JAPAN 2nd Featherweight Championship Tournament happens on June 17, 2018, at Saitama Super Arena in Saitama, Japan. This event pits fighters like Kaito Ozawa, Yuta Murakoshi, Ryusei Ashizawa, and Haruma Saikyo in a Featherweight Championship Tournament. Competitors face off in an eight-man bracket to claim the title. The night features intense kickboxing showdowns. It’s a pivotal moment for K-1’s featherweight division.