Tomoi 【友井】4 The Japanese surnames etymology dictionary.
Aichi-ken , Toukyou-to , Mie-ken . Thing . Aichi-ken Nagoya-shi When Tokugawa Ieyasu, a military commander of the Sengoku period, Azuchi-Momoyama period, Edo period passed through Narumi-cho, Miyako- ku, tell him that he found the birth boy by the well well known as Hanai and named it. Mie - ken Toba - shi In Uramura Town tells that it is the descendant of the public house who came from Kyouto - fu Kyouto - shi . Unknown times. Shizuoka-ken Shizuoka-shi In Aoi-ku Otowa-cho it is believed that Mr. Sakai resides and changed from Wakayama-ken · Mie-ken South (formerly Kii) to Shizuoka-ken Shizuoka-shi Aoi-ku Anzai. 酒井 reference.