Etymology and distribution of 高数後.

Takasugo 【高数後】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Kouchi-ken . Kouchi-ken Takaoka-gun Ochi-chou Origin of Mt. A place name with a record since the Azuchi-Momoyama period. Kouchi-ken Kouchi-shi Marunouchi was in the Edo period in the Tosa clan of the clan office. The same clan says that he also wrote "Okayama". 所山 Shoyama reference.