| Birth Date: | 12 March 1933 |
| Birth Place: | Ishikawa Prefecture, Japan |
| Height: | 167 cm |
| Weight: | 60 kg |
| Sport: | Diving |
| Show-Medals: | yes |
Ryo Mabuchi (馬淵 良, 12 March 1933 – 22 November 2021) was a Japanese diver who won the 10 platform event at the 1958 Asian Games. Together with his wife Kanoko Tsutani-Mabuchi, he competed in the springboard and platform at the 1956 and 1960 Summer Olympics and placed 12th–18th. His daughter Yoshino Mabuchi also became an Olympic diver.
Mabuchi died of emphysema on 22 November 2021, at the age of 88.[1]