Numase 【沼瀬】2 The Japanese surnames etymology dictionary.
Nagasaki-ken , Hiroshima-ken . Terrain . A variant of 渕山 . Nagasaki-ken Oomura-shi Kushima was in the Edo period in the clan Omura of the Clan Office. The same clan says that the descendant of Mr. Yamaguchi was called. There is "mountain" in Yamaguchi. 山口 reference. Nagasaki-ken Higashisonogi-gun Higashisonogi-chou Rogo Township is based.