Shun'ichi or Shunichi (written: 俊一 or 駿一) is a masculine Japanese given name. Notable people with the name include:
Shunichi Amachi (天知 俊一) (1903–1976), Japanese baseball player and manager
Shun'ichi Amari (甘利 俊一) (born 1936), Japanese academic
Shunichi Ikenoue (池ノ上 俊一) (born 1967), Japanese footballer
Shunichi Iwamura (岩村 俊一) (born 1940), Japanese sprint canoeist
Shunichi Kajima (梶間 俊一) (born 1944), Japanese film director
Shun'ichi Kase (加瀬 俊一) (1897–1956), Japanese diplomat
Shunichi Kawai (川合 俊一) (born 1963), Japanese volleyball player
Shunichi Kumai, Japanese footballer
Shunichi Matsumoto (松本 俊一) (1897–1987), Japanese diplomat
Shunichi Miyamoto (宮本 駿一) (born 1986), Japanese musician and voice actor
Shunichi Mizuoka (水岡 俊一) (born 1956), Japanese politician
Shunichi Nagasaki (長崎 俊一) (born 1956), Japanese film director and screenwriter
Shunichi Nakajima (中島 俊一) (born 1982), Japanese footballer
Shun'ichi Suzuki (politician) (鈴木 俊一) (born 1953), Japanese politician
Wakashoyo Shunichi (若翔洋 俊一) (born 1966), Japanese mixed martial artist, kickboxer and sumo wrestler
Shunichi Tanaka (田中 俊一) (born 1987), Japanese footballer
Shunichi Yamaguchi (山口 俊一) (born 1950), Japanese politician
Shunichi Yamashita (山下 俊一) (born 1952), Japanese physician
Shun'ichi Yukimuro (雪室 俊一) (born 1941), Japanese screenwriter
