Japan's ruling coalition began deliberations on a bill to reduce the number of House of Representatives seats on June 29 [1].

The move signals a push for legislative streamlining but has sparked a procedural crisis in the Diet. By bypassing consensus with opposition parties, the ruling bloc risks deepening political polarization and setting a precedent for unilateral lawmaking.

The bill, submitted by the Liberal Democratic Party and the Nippon Ishin no Kai, entered the House Special Committee on Political Reform this Monday [1]. The ruling coalition aims to implement a 10% reduction in the total number of lawmaker seats [4].

Five opposition parties, including the Democratic Party for People, the Sansei Party, and the Center Reform Union, boycotted the session. These parties said the decision to begin deliberations without a cross-party agreement is unconstitutional and a violation of parliamentary procedure.

Shigenori Shigetoku, the Diet affairs chief for the Center Reform Union, criticized the process during the session. He said that if the government attempts to pass the bill using only the ruling party's proposal, attendance, and vote, the legislature itself would be losing its way [1].

The ruling coalition plans to hold a vote on the bill on June 30 [2]. While some reports suggest the ruling bloc is moving toward an immediate vote, other accounts indicate the broader goal is to ensure the bill is fully enacted by the end of the current session on July 17 [3].

Opposition members continue to argue that the ruling party used the committee chairperson's authority to force the special committee meeting [2]. They said this action damages the established rules of parliamentary management. Despite these objections, the ruling parties said they intend to proceed quickly to realize functional reforms of the assembly [2].

“The ruling coalition aims to implement a 10% reduction in the total number of lawmaker seats.”

The attempt to force a seat reduction through a unilateral vote reflects a high-stakes gamble by the LDP and Nippon Ishin no Kai to project an image of reform. However, the boycott by five opposition parties suggests that the procedural method of achieving the cut may overshadow the policy goal. If passed without consensus, the law could face legal challenges or lead to prolonged legislative deadlock in future sessions.