Tarusawa 【足沢】3 The Japanese surnames etymology dictionary.
Toyama-ken Oyabe-shi . Estimated from the ridge and the ridge. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office. The same clan says that Toyama-ken is out and that he is the descendant of Mr. Nishio. There is "tail" in Nishio. 西尾 reference. It was in the Toyama-ken Toyama-shi during the Warring States Period. Toyama-ken Oyabe-shi Told down that it is a pioneer in the lower middle.