Bellator MMA vs. Rizin FF and Rizin 40 (also known as Bellator MMA x Rizin 1) was a mixed martial arts event being co-promoted by Bellator MMA and the Rizin Fighting Federation that took place on December 31, 2022, at the Saitama Super Arena in Saitama, Japan.

[2][3][4][5][6] The main card saw fighters from each promotion fight each other, with the Bellator representatives including a current champion and three former champions: Patrício Pitbull, A. J. McKee, Juan Archuleta and Kyoji Horiguchi.

Matches were contested under Rizin's ruleset, which differs from Bellator's usual Unified Rules of Mixed Martial Arts.

[7] The main card aired tape delayed in the U.S. on Showtime, Bellator's regular broadcast partner.

[3] [8]