The pair are set to throw down in the biggest fight in Japanese history May 2 at Tokyo Dome.

Inoue (32-0, 27 KOs) will put his Ring, IBF, WBA, WBC and WBO 122-pound titles on the line. Nakatani (32-0, 24 KOs) made his debut at 122 pounds in December on "The Ring V: Night of the Samurai" against Sebastian Hernandez, winning a controversial unanimous decision.

Inoue went 4-0 in 2025, beating Kim Ye-joon, Ramon Cardenas, Murodjon Akhmadaliev and Alan Picasso, the last of which headlined the card on which Nakatani beat Hernandez.

Both fighters are in The Ring's pound-for-pound top 10, with Inoue at No. 2 and Nakatani at No. 7.