Kōshien (甲子園) often refers to:

• Koshien, Nishinomiya, Hyōgo Prefecture, a neighborhood of Nishinomiya, Hyōgo, Japan
• Koshien Stadium, a baseball stadium in Koshien which is the venue of the annual high school baseball tournaments
• Kōshien baseball tournament, two annual baseball tournaments played by Japanese high schools nationwide

Kōshien may also refer to:

Places

• Kōshien Station on the Hanshin Main Line in Nishinomiya, Hyōgo
• Kōshien Hotel in Nishinomiya, Hyōgo, now part of Mukogawa Women's University

Sport

• Kōshien baseball tournament, high school tournaments generally referred to as Kōshien
  • Japanese High School Baseball Championship, commonly called Summer Kōshien
  • Japanese High School Baseball Invitational Tournament, commonly called Spring Kōshien
• Kōshien (series), Japan-exclusive high school baseball-themed video games released for various systems
• Koshien Bowl, an American football championship held in Koshien Stadium

Education

• Koshien Junior College in Nishinomiya, Hyōgo
• Koshien University in Takarazuka, Hyōgo