Mase 【眞瀬】2 The Japanese surnames etymology dictionary.
Gunma-ken Kiryuu-shi , Niigata-ken Odjiya-shi . Terrain . Gunma-ken Kiryuu-shi In the Kuroneko town inn, it is said that Niigata-ken got out of the mountain and entered the mountain when the water shortage occurred, so that we added the mountain to the real name Shimizu as a result of discovering the spring water. Estimated in the Edo period. 清水 reference.