Etymology and distribution of 砂井.

Sagoi 【砂井】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

榛谷 Hangai reference.

Sai 【砂井】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Kumamoto-ken Tamana-gun Nagomi-machi . Kumamoto-ken Tamana-gun Nagomi-machi Meiji New surname by monk of Sogukuji in Shogawa Shin Buddha. Estimated from the hospital name of Kosakudenin.

Sunai 【砂井】^{レベル3
About 300}  The Japanese surnames etymology dictionary.

Gunma-ken , Saitama-ken , Toukyou-to .

① Saitama-ken Warabi-shi Tsukagoshi's birth. A place name with a record since the Edo period. It is distributed in the same place.

② Yamanashi-ken Fuefuki-shi Birth of the Yoshida of Hitotsubashi in Isawawa Town (Tsukanokoshi). Yamanashi-ken Fuefuki-shi In Onoji Temple in Osaka-machi, from 1558 to 1570 (Eiroku year) tell Nikaido's descendant from the name of Tsukanoshi's place name. In the same place there is also a story that the mound was referred to as Yoshimasa Shrine and it was a god of houses. 二階堂 Nikaidou reference. Yamanashi-ken Fuefuki-shi Misaka Town In the soba Tsukusha, from 1261 to 1264 (Hiroshi length years) tell him that he lived in the same place.

* Toukyou-to Chiyoda-ku Chiyoda was in the Edo era as the shogunate of the Edo shogunate of the government agency. The shogun shall tell from Gunma-ken Takasaki-shi Kurabuchi-cho Sannokura's Tsukagoshi. Period, location unknown. Gunma-ken Fujioka-shi It was in the Azuchi-Momoyama period in the forest. Saitama-ken Sakado-shi Tsukagoshi is a place name with a record since the Sengoku period.