Seijirō, Seijiro or Seijirou (written: 征二郎 or 晴二郎) is a masculine Japanese
given name. Notable people with the name include:
Hirai Seijirō (平井 晴二郎) (1856–1926), Japanese railroad engineer
Seijirō Kōyama (神山 征二郎) (born 1941), Japanese film director
Name list
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