Participation was limited to the East Asian countries (Japan, South Korea, Taiwan, and China).

The 2009 season was reduced to a single-game championship between the champions of NPB and KBO League and held at the Nagasaki Stadium.

[2] A potential 2010 season was then cancelled due to a conflict with the 2010 Asian Games[3] and replaced by another sets of Club Championship.

[4] The subject of re-introducing the event for 2011 was discussed in a November 2010 meeting between the heads of the NPB, KBO, CPBL, and ABL.

[6] All games have the designated hitter rule in effect, though not all participating teams would have it in their regular league.