Ishiga 【石我】3 The Japanese surnames etymology dictionary.
Hokkaidou · Toukyou-to . Occupation . From the shop name of Izumoya originated from Shimane-ken eastern part (formerly Izumo). Izumo is a place name whose name is recorded since the Asuka period as the country name. Toukyou - to Suginami - ku There is distribution in Takedo east.