Hosoyama 【細山】5 The Japanese surnames etymology dictionary.
① 元永 surname is present. It was in the Okinawa-ken period during the Ryukyu Kingdom. Okinawa-ken Miyakojima-shi Taira is headquartered. Niigata - ken Niigata - shi tells that it is the descendant of the fallen of Heike. 平 reference.
② Creation . Yamaguchi-ken Yamaguchi-shi In the deep groove corridor, tell the story that the gods gave it after the completion of the opening of the same area in 1702 (Genroku 15 years). In estimation, Yamaguchi-ken Hagi-shi Horiuchi is the lord of Choshu of the clan government.