Sumiya 【炭屋】3 The Japanese surnames etymology dictionary.
Yamaguchi-ken Iwakuni-shi · Hyougo-ken . Terrain . A variant of 谷広 . In estimation, Yamaguchi-ken Iwakuni-shi Yokoyama changed name "Hiroshi" which Mr. Yoshikawa of Iwakuni lord of the clan office used as a transit and changed name in early Edo period. Yamaguchi-ken Iwakuni-shi Kurokacho Shimotani (Shimodani) is a place name unknown in the record era. It is distributed in the same place.