Junto Nakatani battered Ryota Yamauchi throughout most of their one-sided, 112-pound title fight Saturday in Saitama, Japan.

The rangy southpaw, who is unusually tall for his division, hurt and stopped his countryman in the eighth round of their scheduled 12-rounder on the Gennadiy Golovkin-Ryota Murata undercard at Saitama Super Arena. The unbeaten, 24-year-old Nakatani (23-0, 18 KOs) made the second defense of his WBO flyweight title and became the first fighter to stop Yamauchi inside the distance (8-2, 7 KOs).

Tokyo’s Yamauchi, the WBO’s number two contender for Nakatani’s title, had won four straight fights before Sagamihara’s Nakatani stopped him. His only previous loss was a 12-round unanimous decision to Wulan Tuolehazi (then 10-3-1) in March 2019.