Sumon, Niigata
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Sumon (守門村; -mura) was a village located in Kitauonuma District, Niigata, Japan.
As of 2003, the village had an estimated population of 4,663 and a density of 38.85 persons per km². The total area was 120.03 km².
The village was merged into the city of Uonuma in November 1, 2004.