Kawakubo 【川窪】5 The Japanese surnames etymology dictionary.
① Occupation . From the shop name of the silk store (Quinya). Tottori - ken Hino - gun Nichinan - chou tell him that he was engaged in agriculture in the new shop. Estimated in the Edo period. Hiroshima-ken Hiroshima-shi Naka-ku Kamamachi was in the Edo period in the Hiroshima samurai of the Clan office.