The Central League was founded in 1949 with eight teams: four holdovers from the previous Japanese Baseball League — the Chunichi Dragons, the Hanshin Tigers, the Yomiuri Giants, and the Shochiku Robins (formerly the Taiyō Robins) — and four new teams — the Hiroshima Carp, the Kokutetsu Swallows, the Nishi Nippon Pirates, and the Taiyō Whales.

The Nishi Nippon Pirates existed for one season — they placed sixth in 1950, and the following season merged with the also Fukuoka-based Nishitetsu Clippers (a member of the Pacific League) to form the Nishitetsu Lions, who joined the Pacific League.

This brought the number of Central League teams down to an ungainly arrangement of seven.

Ryuji Suzuki retired as CL president in 1984 after 33 years at the post.

Under the previous system, there was no post-season playoff and the winner of the pennant automatically qualified for the Japan Series.