1933 in Japanese baseball
 Professional Baseball
 High School Baseball
The 19th National High School Baseball Championship featured a total of 671 schools competing for 22 spots in the finals at Koshien. In the championship game Chukyo High School (Aichi) defeated Heian High School (Kyoto) by a score of 2 - 1.
The 10th National High School Baseball Invitational Tournament featured 32 schools competing in the tournament at Koshien. In the championship game Gifu High School (Gifu) defeated Akashi Central High School (Hyogo) by a score of 1 - 1.
 University Baseball
 Tokyo Big6 Baseball League
The league only held a single season.
 Tohto University Base Ball League
 Kansai 6 University Baseball League