RIZIN 12 live from the Aichi Prefectural Gymnasium in Nagoya, Japan, for the first time. The main event of the evening features the consensus No. 1 lightweight in RIZIN, Yusuke Yachi, taking on late-replacement opponent Luiz Gustavo. Yachi rides a six-fight winning streak into the ring following wins against UFC veterans Diego Nunes, Takanori Gomi and Daron Cruickshank. Gustavo comes in with a lengthy winning streak of his own into his promotional debut. Gustavo has stoppages in all eight of his professional wins.