Etymology and distribution of 平坡.

Hirasaka 【平坡】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Okinawa-ken Ishigaki-shi , Okinawa-ken Naha-shi . Distribution including jacobe as well. Okinawa-ken Nanjou-shi Origin of Yashiba. A place name with a record since the Kingdom of the Ryukyus. The Ryukyu sound is also Jacob.