In a sensational development, the Social Democratic Party of Japan has declared the resignation of Mr. Newgaki as invalid. The debate over the legality and consequences of this refusal is expected to unfold in the coming days. This controversy adds a new chapter to the ongoing turbulence within the party.

In Japanese politics, party cohesion and loyalty are crucial. The rejection of Newgaki's resignation shows a strong initiative to maintain unity within the party. The situation's handling is likely to be closely watched and will undoubtedly result in discussions regarding party politics and individual rights within a political party.

In contrast, such issues in the U.S. and EU are often managed through internal party discussions and, if needed, through legal procedures. The resolution depends on the party's constitution and the standing laws to uphold individuals' rights within a party system.