たちあがれ日本
He joined the Sunrise Party of Japan on April 10, 2010. In 2012 that party merged with another party to become the Japan Restoration Party. In 2014 the former Sunrise Party members, led by Shintaro Ishihara and including Fujii, split from the Restoration Party to form the Party for Future Generations. He was appointed as the inaugural chairman of the party's executive council and also head of the party's electoral strategy committee. In the December 2014 general election he was the party's candidate for the Tokai proportional block but lost his seat. After the election he replaced Hiroyuki Sonoda as an advisor to the party.