Both the champion and the challenger made weight on Saturday ahead of their 145-pound title tilt. Saito tipped the scales at 145.3 pounds, while Ushiku checked in at 144.8. Rizin 31 takes place at Pia Arena in Yokohama, Japan and will also see Kanna Asakura (107.6 pounds) square off against Saori Oshima (105.7) in the co-main event. The card can be viewed via pay-per-view here.
Saito claimed the featherweight crown with a unanimous decision triumph over Mikuru Asakura at Rizin 25. He has won three straight under the Rizin banner, including a split verdict against Vugar Karamov in a non-title bout at Rizin 28 in his last outing.
Ushiku is the reigning Deep featherweight champion and is coming off a split-decision win over Daisuke Nakamura in a title bout at Deep 102 Impact this past July. He has won seven of his last eight professional appear…