Ryosuke Nishida picked up his first win inside the distance since his pro debut.

The unbeaten IBF bantamweight titlist lodged his first successful defense with a seventh round stoppage of Anuchai Donsua. Nishida floored Donsua twice, the latter which prompted referee Katsuhiko Nakamura to stop the contest at 1:37 of the seventh round Sunday at Sumiyoshi SportsCenter in Osaka, Japan.

The difference in class was evident from the outside.

Osaka's Nishida (10-0, 2 KOs)—The Ring No. 2 bantamweight—enjoyed a four inch height and two-and-a-half inch reach advantage. The 28-year-old southpaw put both to good use.

Thailand's Donsua, also 28, fought both outside of his country and for a major title for the first time and was ill-equipped for the occasion. Nishida kept the visiting challenger at the end of his long right jab, which set up right hooks and left hand power shots for much of the night.

Donsua was made to pay for every mistake. His effort to push the action in the fifth resulted in the bout's first knockdown, when Nishida floored him with a counter shot. Donsua beat the count but was already on borrowed time.

Nishida closed the show in style. A perfectly placed left uppercut to the body sent Donsua down midway through the seventh. Donsua (16-1, 7 KOs) crawled on the canvas before he barely made it to his feet. However, he was unable to convince the referee that he was able to continue, at which point the contest was brought to a halt.

The feat ended a string of nine consecutive distance wins for Nishida, dating back to his second pro bout. His career began five years ago with a first-round knockout in Thailand, with every other bout won via unanimous decision.

Nishida dethroned two-time IBF bantamweight titlist Emmanuel Rodriguez (22-3, 13 KOs; The Ring No. 6 bantamweight) on May 4 at EDION Arena in Osaka. The win came two before Yoshiki Takei (10-0, 8 KOs; The Ring No. 4 bantamweight) lifted the WBO title from Jason Moloney (27-3, 19 KOs; No. 7 at 118) to give Japan a clean sweep of major titlists at the weight.

Junto Nakatani—The Ring No. 1 bantamweight and No. 9 pound-for-pound—won the WBC title earlier this year to become a three-division titleholder. Tokyo's Seiya Tatsumi (12-0-2, 8 KOs) advanced to No. 2 in The Ring bantamweight ratings after he defeated countryman Takuma Inoue (20-2, 5 KOs; No. 5 at 118) for the WBA strap.

Nishida-Doncua aired live on U-Next in Japan.