Etymology and distribution of 追原.

Oihara 【追原】^{レベル3
About 50}  The Japanese surnames etymology dictionary.

Yamaguchi-ken .

① Occupation . From the shop name of Okaya. Yamaguchi-ken Yamaguchi-shi Tempered root is based. It was in the Edo period in Yamaguchi-ken Ube-shi .

② 岡谷 family name. It was in Muromachi era in Tottori-ken Tottori-shi .

※ Kyouto-fu Uji-shi Birthplace of Okaya (Okaya) originated. A place name with a record since the Nara period. Kyouto-fu Kyouto-shi has a record of Okaya's family name in 748 (Tenpyo 20 years). Baekje system . Kyouto-fu Southern (formerly Yamashiro) had a family name of Okaya-son in Heian Period.