interleague game between the Central and Pacific baseball leagues
Refers specifically to the regular-season interleague series in Nippon Professional Baseball (NPB) where teams from the Central League (セ・リーグ) and Pacific League (パ・リーグ) play each other.
This year's interleague games between the Central and Pacific Leagues start in June.
In the interleague series, the local team will face a powerhouse from the Pacific League.
The Central League, one of the two NPB leagues; セ in セパ交流戦 is its abbreviation.
The Pacific League, the other NPB league; パ in セパ交流戦 is its abbreviation.
Abbreviation of セントラル・リーグ (Central League) and パシフィック・リーグ (Pacific League) combined with 交流戦 (interleague play).