"Wakasa Province," "Shima Province," and "Awaji Province," the estimation of Miketsukuni from the descriptions in the Manyoshu, and the theory that Miketsukuni was special for Imperial family and Imperial court, were mostly due to a study by Hisashi KANO.
『若狭国』・『志摩国』・『淡路国』と万葉集にみる御食国への推定と、御食国が皇室・朝廷にとって特殊であるという説は、狩野久の研究によるところが大きい。