The origins of Ise Shingun are derived from the mythological days when Owakugo-no-mikoto, a descenant of Amenohiwake-no-mikoto bestowed upon Amaterasu Omikami of the lands, 'Shinkoku' (no relation to later concepts called 'shinkoku') east of the Isobe-gawa River (however, it is said that the river is actually the Shitahi-ogawa River).
その由来は古く、天日別命の子孫・大若子命が磯部川（ただし実際には下樋小川であるという）以東の土地を天照大神に寄贈した「神国」（後世言われる神国とは無関係）に由来する。