Can LDP reduce the number of the Diet seats?

The PM Shinzo Abe made a promise with the former PM Yoshihiko Noda on reduction of the number of the seats of the Diet 2 years ago. The reason why Mr. Noda demanded is that he believed the Diet also has to undergo pain as the Diet imposes an additional consumption tax burden on people. Mr. Abe agreed to it at that time. But the number of the seat was only reduced 5 seats due to adjustment of equality of vote among city and local area.

Many people think it unfair that while tax is raised, the cut of the seats is very much limited. The opponent parties should jointly criticize the unwilling attitude of the ruling party.