Sekiyado (関宿町, Sekiyado-machi) was a town located in Higashikatsushika District, Chiba Prefecture, Japan. Bordered by the Tone River and Ibaraki Prefectureto the east, and the Edo River and Saitama Prefecture on the west, it was formerly the northernmost municipality in Chiba Prefecture. On June 6, 2003, Sekiyado was merged into the expanded city of Noda and ceased to exist as an independent municipality. As of June 1, 2003, (the last data from before the merger), Sekiyado had an estimated population of 30,710 and a density of 1295 persons per km². The total area was 29.82 km². * v * t * e