Takuma Inoue (19-1; 5) retained his WBA bantamweight title when he scored a ninth-round knockout against former IBF junior bantamweight champion Jerwin Ancajas (34-4-2; 23) on Saturday in Tokyo, Japan.
Inoue showed terrific hand speed and was better at infighting against the hard-hitting southpaw Ancajas.
The Japanese fighter was in control throughout against the veteran Filipino, as he scored with left hooks to the head and stinging shots to the body that slowed the challenger down.
In the ninth round, he scored with a big right uppercut that sent Ancajas down in pain as he failed to beat the count.
Junto Nakatani wins the WBC bantamweight title
Two-division champion Junto Nakatani (27-0; 20) won the WBC bantamweight title as he scored two knockdowns against defending champion Alejandro Santiago (28-5-5; 14) and won on a sixth-round technical knockout at 1:12 into the round.
Kosei Tanaka wins WBO junior bantamweight title
Former three-division WBO champion Kosei Tanaka (20-1; 11) won the vacant WBO junior bantamweight title against the rugged Mexican Christian Bacasegua (22-5-2; 9) in a hard-fought contest on a unanimous 12-round points decision.
The scores were 116–111, 117–110, and 119–108.
Going into the fight as the overwhelming favourite, Tanaka did not impress but scored a knockdown midway through the ninth round.
It was Tanaka's fourth WBO belt in four different weight divisions.