The Japanese Baseball League was a professional baseball league in Japan. It was established on February 5, 1936 as "Japan Occupational Baseball League". Then it was renamed "Japanese Baseball League" in 1939. It was run until 1949. There was no League Play in 1945. The league played fall and spring seasons in 1937 and 1938. Four of the franchises formerly in this league currently play in the Central League, and four others are in the Pacific League.
Teams
Dai Tokyo (1936) → Lion Baseball Club (1937–1940) → Asahi Baseball Club (1941–1944) → Pacific Baseball Club (1946) → Taiyō Robins(1947–1949) → To the Central League (later renamed the Shochiku Robins)
Korakuen Eagles (1937s) → Eagles Baseball Club (1938–1939) → Kurowashi Baseball Club (1940–1941) → Yamato Baseball Club (1942–1943) → Broken up
Nagoya Baseball Club (1936–1943) → Sangyo Baseball Club (1944) → Chubu Nippon (1946) → Chubu Nippon Dragons (1947) → Chunichi Dragons (1948–1949) → To the Central League