Satoshi Maruo (; born 28 November 1991) is a Japanese male athlete competing in the 50 kilometres race walk. He represented Japan at the 2016 IAAF World Race Walking Team Championships and the 2017 World Championships in Athletics, finishing fifth at the latter event in a personal best of 3:43:03 hours The Japanese team was very successful at the event with all three men finishing in the top five. He is a member of the Aichi Steel athletics team.