HASHIMOTO Koji (橋本 亘司) is a sports instructor who was the one of the eight qualifiers in the SASUKE 21 Trials. In the trials, he cleared the "Final Stage" in 49.91 seconds, and managed to get the #7 qualifying spot.

During the tournament, he showed great speed, clearing most of the obstacles quickly. He reached the Soritatsu Kabe in great time, with about a minute left. However, he could not scale the wall and timed out there.