Otomasu 【乙益】3 The Japanese surnames etymology dictionary.
Hyougo-ken Shisou-shi , Hyougo-ken Himeji-shi . Thing . From gold. Hyougo-ken Shisou-shi Yukisaki Town Sukasawa is based. It is said that the mine which was near the same place changed the notion that "woven metal" is better after notation of "deposit", "lower money" as being a mountain where gold is weaved. Estimated from tradition is Edo period. It is unknown whether the deposit will exist. 下金 reference.