Japan Series Titles: 0
Pacific League Pennants: 1 (1960)
The Daimai Orions were formed in 1958 by the merger of the Daiei Unions and Mainichi Orions. The merged team was a powerhouse, finishing second in 1959 and winning the Pacific League pennant in 1960 but fading from there. In 1964 they became the Tokyo Orions.
1958 - 1963