83rd National High School Baseball Championship Commemorative Ball Baseball High School Baseball Koshien This is the Koshien commemorative ball from the 83rd tournament in 2001. Winning school: Nihon University Third High School Catchphrase: Summer with You Participating schools: 49 Home runs in the tournament: 29 The first championship tournament of the 21st century There are stains and scratches as shown in the photo because it was used for wall practice in the park several times.