Sachi Amma (born September 23, 1989) is a Japanese professional rock climber and sport climber.

He won the IFSC Climbing World Cup twice, in 2012 and 2013.

In 2009, 2010 and 2012 he also competed, occasionally, in the Bouldering discipline, with less encouraging results.

He mainly climbs indoor, but he also proved to be one of the strongest rock climbers in the world, by redpointing three routes graded 9a+ (5.15a): Papichulo (Oliana), Pachamama (Oliana), and La Rambla (Siurana).

He has since redpointed one additional 9a+ (5.15a): Realization (Céüse)[1] and two routes graded 9b (5.15b): Soul Mate (Gozen Rock) and Fight or Flight (Oliana),[2] the former becoming Japan's hardest sport climb.