Background On April 23, 2026, it was announced that the "RIZIN JAPAN GP Heavyweight Tournament" will take place in 2026, which semifinals matches will be held at
Rizin 54 in August, and the two winners will advance to the final match scheduled in November event. The tournament taking part as participants: Mikio Ueda,
Tsuyoshi Sudario, King Edokpolo, and opponent
TBA fighter. The winner of the tournament should face Alexander Soldatkin on New Year's Eve event and compete for inaugural heavyweight title.{{Cite web |title=【RIZIN】8月11日「RIZIN JAPAN GP ヘビー級トーナメント」に上田幹雄、スダリオ剛、エドポロキングが参戦。残り1枠は未定。6月6日の仙台大会で酒井リョウvs.貴賢神も
Tournament bracket ==Rizin 52==