Ishi 【石】レベル4
About 1,300
The Japanese surnames etymology dictionary.
Kanagawa-ken Yokohama-shi Tsurumi-ku, Toukyou-to . Heterogeneity of 磯谷 . Saitama-ken Kuki-shi Illusions told that Mika was writing "Edo valley" in the Edo period. 磯谷 reference.