The Hatomander (ハトマンダー, hatomandā, a portmanteau of Hatoyama and Gerrymander) was an electoral reform proposed in the 1950s by Japanese prime minister Ichirō Hatoyama and his third cabinet. His plan was to replace the SNTV multi-member constituencies for the House of Representatives (usually called chū-senkyo-ku, "medium electoral districts", in Japanese) entirely with First-past-the-post single-member districts (shō-senkyo-ku, "small electoral districts"). The change would have made it easier for Hatoyama's Liberal Democratic Party (LDP) to gain a two-thirds majority on its own, enabling him to pursue his plan to change the Japanese Constitution, particularly Article 9. The plan faced strong opposition led by the Japanese Socialist Party (JSP) that accused Hatoyama of wanting to "hatomand