Isazawa 【五十澤】1 The Japanese surnames etymology dictionary.
Miyazaki-ken , Kumamoto-ken , Gunma-ken . Kumamoto-ken Yamaga-shi Kamoto-cho, Ishikubu -ken . A place name with a record since the Edo period. Gunma-ken Fujioka-shi Tradition in Shinozuka. I tell him that he lived in the same area in 1369 (2nd year of revival, 24th year of Shinpea).