The Liberal Democratic Party has won four of the five by-elections for the House of Representatives. The opposition parties are wary of an early dissolution of the House.

The Japan Restoration Party aims to become the first opposition party to win a seat in the next election. The party plans to recruit and train human resources in order to field candidates in all single-member constituencies. The LDP is expected to win the next by-election on September 26. The next election for the seat will be held on September 28.