Yuichi Nakagaichi (中垣内 祐一, Nakagaichi Yūichi, born November 2, 1967 in Fukui, Fukui) is a former volleyball player from Japan, who played for the Japan men's national volleyball team in the 1990s. Playing at the 1992 Summer Olympics in Barcelona, Spain he ended up in 16th place at the 1998 World Championship. On 26 October, 2017, Nakagaichi became the head coach of the Japan men's national volleyball team and he retired in September 2021, after led the team finished as runners-up in 2021 Asian Men's Volleyball Championship.