The budding trend of champions from North American MMA promotions taking on their Japanese counterpart will continue in the Rizin ring. Rizin FF has announced a women’s champion vs. champion fight at Rizin 16, with Rizin super atomweight (108 pounds) champion Ayaka Hamazaki taking on on Invicta FC atomweight champ Jinh Yu Frey on the June 2 event in Kobe, Japan.  Frey (8-3 MMA) is on a two-fight win streak. She defeated Minna Grusander via unanimous decision at Invicta FC 30 to claim the title, then won an Invicta FC 33 rematch via split decision.  Tokyo’s Hamazaki (17-2 MMA) has won three straight bouts and eight of nine. Her most recent victory was a second-round armbar submission of Kanna Asakura at Rizin 14 to claim the super atomweight belt.  This fight is a rematch, as Hamazaki’s current 8-of-9 run includes a second-round doctor stoppage TKO of Frey at Invicta FC 19. This champ-champ booking continues Rizin’s open-door policy toward booking champions