December 2003: Established the Hiki Area Council for the Merger of Three Towns and Three Villages by six towns and villages of Namegawa-machi, Ranzan-machi, Ogawa-machi, Tokigawa-machi, Tamagawa-mura and Higashichichibu-mura
2003年12月滑川町・嵐山町・小川町・都幾川村・玉川村・東秩父村の６町村は比企地域３町３村合併協議会を設置