With Ono's support, Nakagawa ran as a LDP candidate for
Hokkaido 5th district in the
1963 House of Representatives election and was elected. Nakagawa joined the Ono faction, but after Ono died in 1964 the faction split between Ono's lieutenants, Naka Funada and Isamu Murakami, and Nakagawa joined the Funada faction. He also developed a close relationship to
Takeo Fukuda, whom he twice served under as parliamentary vice minister when Fukuda was minister of finance. In 1973, Nakagawa, along with
Shintaro Ishihara,
Michio Watanabe,
Koichi Hamada and others, formed a cross-factional rightist group of junior LDP Diet members, called the
Seirankai, or Blue Storm Society. Nakagawa was the leader of the
Seirankai, which received notoriety for its members signing a pledge in blood. After Takeo Fukuda was elected LDP president and prime minister in December 1976 Nakagawa was made chief of the LDP National Movement Headquarters, and when Fukuda
reshuffled his cabinet in November 1977 Nakagawa entered as Minister of Agriculture. Nakagawa served as director general of the Science and Technology Agency under Zenko Suzuki. He ran in the November 1982 LDP presidential election to succeed Suzuki, but lost in fourth place. In 1982, a magazine released a picture of Nakagawa relieving himself onto a tree in the garden of the Diet building's compound. This incident was widely criticized in the media and the opposition party sent a protest note against this action. ==Death and legacy==