Kōsei, Kosei or Kousei may refer to:

Places

• Kōsei, Shiga, a former town in Kōka District, Shiga, Japan

Transport

• Kosei Line, a railway line in Japan
• Kōsei Station, a train station in Konan, Shiga, Japan

People

• Charlie Kosei (born 1950), Japanese musician
• Kosei Akaishi (赤石 光生, born 1965), Japanese sport wrestler
• Kosei Egawa (恵川 光生), Japanese Paralympic swimmer
• Kosei Gushiken (born 1942), Japanese triple jumper
• Kōsei Hirota (born 1951), Japanese voice actor
• Kosei Inoue (born 1978), Japanese judoka
• Kosei Ishigami (石神 幸征, born 1990), Japanese footballer
• Kosei Kitauchi (born 1974), Japanese football player
• Kosei Nakamura (中村 幸聖, born 1981), Japanese footballer
• Kosei Ono (born 1987), Japanese rugby player
• Kosei Shibasaki (born 1984), Japanese football player
• Kōsei Tomita (born 1936, dead 2020), Japanese voice actor
• Kosei Yamaguchi (山口 浩勢, born 1991), Japanese long-distance runner

See also

• Kosei Maru (disambiguation)