Kōyō

Kōyō, Koyo or Kouyou (written: 光洋, 光陽, 紅葉, 紅陽, 晃洋, 浩陽 or 昂洋) is a masculine Japanese given name. Notable people with the name include:

• , Japanese baseball player
• , Japanese photographer
• , Japanese astronomer
• , American sumo wrestler
• , Japanese photographer
• , Japanese writer
• , Japanese footballer