Hironaka 【弘中】5 The Japanese surnames etymology dictionary.
Toukyou-to , Saitama-ken , Gunma-ken . Terrain . Gunma - ken Takasaki - shi In Toyookaoka cho, Middle - Tochioka Town tells from Kanagawa - ken Kamakura - shi that he came from 1558 to 1570 (Eriku years) and called it from the mountains and river banks. Iwate-ken In Morioka-shi , tell Gunma-ken Takasaki-shi from the mountain lands at the outskirts.
※ Gunma-ken Takasaki-shi There is also a story from Minegawa Valley of Kanagawa-ken Kamakura-shi in Nakaempuoka Town. Place name recorded in the notation of "Minekishi" in the Nanboku era era. Location unknown.