In professional baseball, six interleague games were played on the 4th. Hanshin, the leader of the Central League, beat Lotte for the second consecutive game.
After the loss, Lotte starting pitcher Aki Sasaki suffered his first loss of the season. Orix moved up to the top of the league with wins over Chunichi and Rakuten. The Giants suffered their first professional loss when rookie pitcher Matsui, who started the game, gave up five runs in three innings.