Hirosawa 【広沢】5 The Japanese surnames etymology dictionary.
② Topography . "Mountain" is added to Mine which is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. Kagoshima-ken Ooshima-gun Yoron-chou There is distribution in tea flowers. Where she in 嶺 there last name. 嶺 reference.
③ things . Fukui-ken Echizen-shi Meiji New surname by monk of Shogun-ji Temple of Jodo Shin Buddha located in village country. "Mine" and "Mountain" are used from Namling Mountain of the same temple's mountain.