The Nagoya High Court ruled Friday that the House of Representatives election in December 2014 was "in a state of unconstitutionality" due to a disparity in the weight of votes between districts.

The court, however, rejected a demand that the election results be nullified. In the lawsuit, plaintiffs had sought the nullification of election results in a total of 25 constituencies in Gifu, Aichi and Mie prefectures.

The ruling came a day after the Tokyo High Court said the vote disparity in the same election was constitutional.

Similar lawsuits have been filed with high courts nationwide by two groups of lawyers.

According to government data, the vote weight disparity in the December 2014 election was 2.13-fold between Tokyo's No. 1 district, the country's most populous single-seat constituency, and Miyagi Prefecture's No. 5 district, the least populous.

The Supreme Court ruled last November that disparities in the weight of votes in the previous Lower House election in December 2012 — which were as great as 2.43 — were "in a state of unconstitutionality."

The Public Offices Election Law stipulates that lawsuits involving the validity of the results of a national election bypass district courts and are initially tried at high courts.