An Ishin party lawmaker, Mori Shima, has made indications towards leaving his party, sparking speculation on multiple sources supporting his decision. Such actions could significantly change the dynamics within the Ishin party. The potential shake-up could impact both local politics and national policies.

Political party dynamics, especially around defections, are of significant interest in Japan. Japan's strict party discipline often results in upheavals when party members contemplate leaving. The departure could have implications on the stand and decisions made by the party on critical legislations, affecting the entire citizenry.

In the US or EU, such instances of party defection are also given much importance. However, unlike in Japan, the political systems in these regions often facilitate a smoother transition of lawmakers between parties.