According to Jinmyocho Kosho: historical investigation on shrines listed in Engishiki jinmyocho (a register of shrines in Japan), which was organized after Nobutsune DEGUCHI's death and completed in 1733 by Hiro KUWAHARA, a Shinto priest of Geku (the outer shrine of Ise), and his son 弘世, Ikutsuhikone is defined as the enshrined deity of Ikune jinja Shrine (presently enshrines Sukunahikona no mikoto and others) in Oshisaka (also pronounced as Ossaka or Osaka) and Sumiyoshi.
出口延経の死後、外宮神官の桑原弘雄、弘世父子によって整理、1733年に完成し、延喜式神名帳記載神社の考証を行った神名帳考証によると、忍坂と住吉にある生根神社の祭神（現在は少彦名命等）とされる。