commonly known as the Zero Nuclear Party in English-speaking countries and as Datsu-Genpatsu (è±åÂÂçº, roughly "phase down nuclear power") in Japan, was a short-lived Japanese political party that was formed on 22 November 2012. Nagoya mayor Takashi Kawamura and Masahiko Yamada were co-presidents and Shizuka Kamei served as secretary-general. The party was merged with other groups to form the Tomorrow Party of Japan on November 27, 2012.