Etymology and distribution of 裏垣.

Uragaki 【裏垣】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

Okayama-ken . A variant of 大神 . Okayama-ken Okayama-shi Kita Ward Marunouchi was in the Edo period in the Clan Okayama of the Clan office. Ooita-ken (formerly Bungoi) pronounced Ogami as Oga and Oomiwa. It was in Ooita-ken Saiki-shi during the Edo period. In Miyazaki-ken Nishiusuki-gun Takachiho-chou tell him that he changed his god of Ogami to "Meiji new surname at the time of hi ". 大神 Oogami reference.