| Birth Date: | 7 September 1917 |
| Death Date: | 30 October 2005 (aged 88) |
| Birth Place: | Fukuoka, Japan |
| Death Place: | Takaishi, Osaka, Japan |
| Sport: | Swimming |
| Show-Medals: | yes |
was a Japanese breaststroke swimmer. In 1935 he set a world record in the 200 m. Next year he won the gold medal in this event at the 1936 Olympics, setting a new Olympic record at 2:41.5. Hamuro swam the traditional breaststroke, while some of his competitors used the butterfly stroke, which was allowed at the time. Between 1935 and 1940 Hamuro never lost a race and won ten national breaststroke titles. After World War II he worked for the Mainichi newspaper as a sports journalist. In 1990, he was inducted into the International Swimming Hall of Fame.
Hamuro's wife was also a swimmer and a world champion in the masters category.