During my high school days, we studied histories on different countries, i remember izanagi and izanami were believed by the ancient japanese deity who created to what is called now JAPAN!
Amaterasu-omikami the sun goddes was born from Izanagi's left eye, Tsukiyomi no Mikoto the moon deity was born from Izanagi's right eye and Susano-no-Mikoto the storm deity was born from Izanagi's nose
Amaterasu has a decendant (too bad i forgot his name
) who became the first emperor of Japan who has the Kusanagi (a sword) and Yata (a mirror)
i hope i was right
Kishi surely is a cool guy to relate this from their ancient history