The National High School Baseball Championship (全国高等学校野球選手権大会 zenkoku kōtō gakkō yakyū senshuken taikai) of Japan, commonly known as "Summer Kōshien" (夏の甲子園 natsu no kōshien), is an annual nationwide high school baseball tournament. It is the largest scale amateur sport event in Japan, even as soccer continues to gain more attention.