Koshien Stadium in the context of "Nishinomiya"

In Japan, Kōshien (甲子園) generally refers to the two annual baseball tournaments played by high schools nationwide culminating at a final showdown at Hanshin Kōshien Stadium in Nishinomiya, Hyogo, Japan. They are organized by the Japan High School Baseball Federation in association with Mainichi Shimbun for the National High School Baseball Invitational Tournament in the spring (also known as "Spring Kōshien") and Asahi Shimbun for the National High School Baseball Championship in the summer (also known as "Summer Kōshien").

Both of these nationwide tournaments enjoy widespread popularity similar to that of NCAA March Madness in the United States, arguably equal to or greater than professional baseball. Summer qualifying tournaments are televised locally and each game of the Spring and Summer tournaments at Kōshien are televised nationally on NHK alongside the TV channels associated with the newspapers organizing the tournaments. The tournaments have gone on to become national traditions, and large numbers of frenzied students and parents travel from their hometowns to cheer for their local team. It is common to see players walking off the field in tears after being eliminated from the tournament by a loss, especially during the Summer Tournament. It symbolizes the third-year players' retirement from high school baseball.