Kayahara 【栢原】4 The Japanese surnames etymology dictionary.
② There is 北条 surname. Gunma-ken Takasaki-shi It was during the Warring States period as a vassal of Mr. Nagano who was the castle owner of Minowa castle in Minoucho cho. Yamagata-ken Yamagata-shi Kasagi-machi was in the Edo period in the clan of the Yamagata of the Clan office. 北条 reference.