Kiyosaki 【清崎】4 The Japanese surnames etymology dictionary.
Ibaraki-ken , Kanagawa-ken , Toukyou-to . Terrain . Variant of 窪谷 . Ibaraki-ken Shimotsuma-shi Mr. Taga valley who was the castle owner of Shimosuma castle in Honjo town was in the Azuchi-Momoyama period, Saitama-ken Kasukabe-shi in the Baidu area, Bingnishi in the Edo era. Ibaraki-ken Yuuki-shi I tell him that he was engaged in agriculture at Sanno. Estimated in the Edo period. Tochigi-ken Oyama-shi In Tanama telling that he was pronouncing Kubonoya too. 久保野谷 reference.