What's in a name? If you're Osaka Mayor Toru Hashimoto and trying to form a new national party that will represent the region but could also become a powerful political player on issues of interest to Prime Minister Shinzo Abe, pretty much everything.

On Oct. 1, Ishin no To (Japan Innovation Party) co-founders Hashimoto and Osaka Gov. Ichiro Matsui, along with some 20 to 25 of the party's Diet members, are expected to launch a new national party. The move effectively splits Ishin, with 51 members at present, between the Osaka faction loyal to Hashimoto and Matsui, and the faction led by Lower House lawmaker Yorihisa Matsuno.

Who will join Hashimoto, stick with Matsuno, or leave for another party has been the subject of intense speculation in and out of Osaka in the past few weeks.