A district in Nishinomiya, Hyōgo Prefecture, and the name of the baseball stadium there. Widely known as the venue for the national high-school baseball tournaments; "Kōshien" is often used to mean those tournaments.
毎年夏になると甲子園は高校野球の熱気でいっぱいになる。
Every summer Kōshien fills with the excitement of high-school baseball.
友達と甲子園で阪神戦を見た。
I watched a Hanshin Tigers game at Kōshien with friends.
甲子園球場は阪神電車の甲子園駅から歩いてすぐだ。
Kōshien Stadium is a short walk from Kōshien Station on the Hanshin line.