日本維新の会
On 10 April 2010, Hiranuma, Ishihara and several other politicians established a new political party, the Sunrise Party of Japan. This party merged with the Japan Restoration Party on 17 November 2012. Hiranuma was one of a number of politicians who subsequently left the Japan Restoration Party to form the Party for Future Generations on 1 August 2014, but was one of only two members of this party to win a seat in the 2014 general election.