Hisaoka 【久岡】5 The Japanese surnames etymology dictionary.
Hyougo-ken , Shizuoka-ken , Ooita-ken . Occupation . From the battlefield which he called the guards responsible for escorts under the rule of the Asuka period in the age of the Tang Dynasty. Niigata-ken Nagaoka-shi Major tradition was in the Edo period in the Echigo Nagaoka clan of the clan government office.