Sōichi, Soichi, Souichi or Sohichi (written: 壮一, 宗一, 聡一, 奏一 or そういち in hiragana) is a masculine Japanese given name. Notable people with the name include:
(born 1942), Japanese politician (born 1972), Japanese baseball player Soichi Ichida (1910–1986), Japanese philatelist (1886–1947), Japanese mathematician , Japanese manga artist (born 1965), Japanese astronaut (1900–1970), Japanese journalist (1885-1971), Japanese-American photographer (born 1989), Japanese footballer (born 1965), Japanese composer