Some of the firearms that bear the name "Kunitomo" are believed to have been made by gunsmiths who were not born in Kunitomo Village but learned gunsmithing skills in the village, or called by the name simply to increase their commercial value.
それに、国友出身でない銃工が国友で修行して「国友」を名乗る例や商品価値を高めるための「国友」銘もあるといわれる。