Kōshirō

Kōshirō, Koshiro or Koushirou (written: 幸四郎, 孝四郎, 高志郎, 庚子郎, 好志郎 or 公志郎) is a masculine Japanese given name. Notable people with the name include:

• Koshiro Itohara (糸原 紘史郎, born 1998), Japanese footballer
• Kōshirō Ishida (石田 幸四郎, 1930–2006), Japanese politician
• Matsumoto Kōshirō (松本 幸四郎), various kabuki actors
• Matsumoto Kōshirō X (十代目 松本幸四郎), Japanese actor and kabuki actor
• Matsumoto Kōshirō VII (七代目 松本 幸四郎), Japanese actor
• Kōshirō Onchi (恩地 孝四郎, 1891–1955), Japanese print maker and photographer
• Koshiro Sakamoto (坂本 光士郎, born 1994), Japanese baseball player
• Koshiro Shimada (島田 高志郎, born 2001), Japanese figure skater
• Koshiro Sugita (杉田 好志郎), Japanese Paralympic swimmer
• Koshiro Sumi (角 昂志郎, born 2002), Japanese footballer
• Koshiro Take (武 幸四郎, born 1978), Japanese jockey
• Koshiro Ueki (植木 庚子郎, 1900–1980), Japanese politician
• Koshiro Yamamuro (山室 公志郎, born 1987), Japanese baseball player
• Yuzo Koshiro (古代 祐三, born 1967), Japanese president of the company Ancient

Fictional characters:

• Koushiro Izumi (泉 光子郎) (Izzy Izumi in English dub), a fictional character from Digimon Adventure.
• Koushiro Sasaki (佐々木 古志郎), a fictional character from Machine Robo Rescue.
• Chikuma Koshirou (筑摩 小四郎), a fictional character from The Kouga Ninja Scrolls

Koshirō or Koshirou (written: 古志郎) is a separate given name, though it may be romanized the same way:

• Koshirō Oikawa (及川 古志郎) (1883–1958), Imperial Japanese Navy admiral