Naoya Inoue cemented his legacy with a unanimous decision win against fellow Japanese Junto Nakatani to retain his undisputed super-bantamweight status in Tokyo.
In what was billed as one of the biggest fights to take place on Japanese soil between two of boxing's top pound-for-pound fighters, Inoue, 33, once again rose to the occasion.
Inoue, a four-division world champion and undisputed in two weight classes, dominated early and adjusted later in the bout as the previously undefeated Nakatani, 28, grew into the contest.
Nakatani, who has held world titles in three divisions, suffered a cut above his left eye from an accidental clash of heads in the 10th round just as he was riding a wave of momentum.
Two judges scored it 116-112 and the third 115-113 at Tokyo Dome.