Sadoyama 【佐渡山】4 The Japanese surnames etymology dictionary.
Toyama-ken Takaoka-shi , Oosaka-fu . Summary . Abbreviation of upper section. Toyama-ken Takaoka-shi Shokoji Temple is based. It is said that in the same place in Kyushu district out of Edo era when the Meiji New Family name with Kamijo surname, "over" is reminiscent of "upper" and renamed with "Article" left. There was also a tale that it was written as "rulers" at the beginning in the same place. It is unknown whether the shelter will exist. 上条 reference.