The Japanese surnames etymology dictionary.
Akita-ken , Hokkaidou , Hiroshima-ken . Creation . In Akita-ken Akita-ken Yurihonjou-shi Iwami Kameda Kamada Town tells that he changed the name of Odora Ogawa of the clan's office from Odori in the Edo era with the large family surname turned "Small". 大縄 reference.