Hasegawa 【馳川】3 The Japanese surnames etymology dictionary.
② Topography . In Kagoshima-ken there are examples where Hira means "cliff". "Yoshi" is a favorable character. It was in the Edo period in Kagase-cho of Saga-ken Saga-shi . Kagoshima - ken Kimotsuki - gun Higashikoshira - chou from Hiryoshimon of the gate division system which was in the Shinkawa west in the Edo period.