Ayaka Hamasaki will face Jinh Yu Frey in a cross-promotional title bout at Rizin 16.
The Japanese promotion announced the atomweight booking on Wednesday. Hamasaki, the Rizin champion, will put her super atomweight belt on the line against Frey, the reigning Invicta 105-pound queen.
Hamasaki and Frey initially squared off at Invicta FC 19, where the Japanese fighter won by doctor stoppage at the 4:38 mark of the second round. Frey was doing well before Hamasaki landed a right hand that opened a gash above her left eye that prompted a doctor to call off the bout.