The Tokyo High Court on Wednesday rejected 15 lawsuits filed by lawyers claiming the results of last year's House of Representatives election are invalid due to the electoral weight being much heavier in some constituencies.

The lawyers, living in Tokyo, Chiba and Kanagawa prefectures, argued that differences in the value of votes in regions and the allocation of Lower House seats for those candidates elected from single-seat constituencies and those from proportional representation are unconstitutional.

Presiding Judge Yomatsu Hinagata said the maximum disparity rate of 2.309 to 1 in the Lower House election cannot be called irrational.

He said the allocation of seats is not subject to deliberation by a court since doing so would be "purely a political judgment."