Sawa 【沢】5 The Japanese surnames etymology dictionary.
Ooita-ken . Creation . In Shimane-ken Izumo-shi tokyo it tells that he used the chief's "neck" because it is Mr. Fujiwara's founder who was dispatched from Mr. Fujiwara. The meaning of "Mr. Fujiwara, the chief." 藤原 reference. In Ooita-ken Taketa-shi (formerly Naomi Township) in the Muromachi period, in the vicinity of Ooita-ken Kunisaki-shi (formerly Kunisaki-gun) in the Azuchi-Momoyama period, Miyagi-ken Tome-shi in the Edo era in the Tōwa town Yonekawa.