Niigata currently sends 9 elected members to the Diet of Japan, 7 to the House of Representatives and 2 to the House of Councillors. The prefecture lost 1 Councillor due to reapportionment in 2019.
House of Representatives The current House of Representatives Niigata delegation consists of 5 members of the LDP, 2 members of the CRA.
Constituency seats DistrictRepresentativePartyIncumbency1stKō UchiyamaLDP9 February 2026 – present2ndIsato KunisadaLDP1 November 2021 – present3rdHiroaki SaitoLDP17 December 2012 – present 4th Eiichiro WashioLDP9 February 2026 – present5thShuichi TakatoriLDP9 February 2026 – present
PR seats Party Representative District contested IncumbencyCRAChinami Nishimura Niigata 1st15 December 2014 – presentMakiko Kikuta Niigata 2nd10 November 2003 – present
House of Councillors The current House of Councillors Niigata delegation consists of 1 member of the CDP and 1 member of the LDP. The members are elected from the Niigata at-large district. ClassCouncillorPartyTerm endsIncumbency2022Kazuhiro KobayashiLDP202826 July 2022 – present2025Sakura UchikoshiCDP203129 July 2019 – present
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