Yūichirō, Yuichiro or Yuuichirou (written: 優一郎, 雄一郎, 裕一郎, or 祐一郎) is a masculine Japanese given name. Notable people with the name include:
Yuichiro Ando (born 1959), Japanese-American painter
Yuichiro Hata (羽田 雄一郎) (born 1967), Japanese politician
Yūichirō Itō (伊藤 祐一郎) (born 1947), Japanese politician
Yuichiro Miura (三浦 雄一郎) (born 1932), Japanese mountain climber
Yuichiro Nagai (永井 雄一郎) (born 1979), Japanese footballer
Yuichiro Nagashima (長島☆自演乙☆雄一郎) (born 1984), Japanese kickboxer
Yuichiro Ueno (上野 裕一郎) (born 1985), Japanese long-distance runner
Yuichiro Uozumi (魚住 裕一郎) (born 1952), Japanese politician
Tochiōzan Yūichirō (栃煌山 雄一郎) (born 1987), Japanese sumo wrestler
