Sunrise Party
On 21 June 2010 Nakayama and his wife Kyoko announced that they would move from the Liberal Democratic Party to the Sunrise Party of Japan. He ran for the House of Councilors in the July 11 2010 election, but was not elected. The Sunrise Party became part of the Japan Restoration Party, and Nariaki returned to the Diet in the 2012 general election. When Shintaro Ishihara's group left that party to form the Party for Future Generations he and his wife went too. He lost his seat again in the 2014 general election.