Kōshirō

• Matsumoto Kōshirō, various kabuki actors
• Kōshirō Onchi, Japanese print maker and photographer
• Koshiro Shimada, Japanese figure skater
• Koshiro Sugita, Japanese Paralympic swimmer
• Koshiro Take, Japanese jockey
• Koshiro Ueki, Japanese politician
• Koshiro Yamamuro, Japanese baseball player

• Koushiro Izumi, a fictional character from Digimon Adventure.
• Machine Robo Rescue, a fictional character from Machine Robo Rescue.

• Koshirō Oikawa, Imperial Japanese Navy admiral