Supposedly a descendant of Ninigi, he was only given his ruling name of Tenno posthumously.
He began the tradition of singing Kume songs to inspire his soldiers. His historical significance was only given native credence in 1890 when the government erected a prayer site at his supposed burial site of Unebi. After leading his people over Ikoma, he led his Hyuga clansmen into complete subjugation of the Yamato country. Supposedly a descendant of Ninigi, he was only given his ruling name of Tenno posthumously. FTP, name this descendant of Amaterasu, the semi-legendary first emperor of Japan.
He began the tradition of singing Kume songs to inspire his soldiers.
{Jimmu} Tenno (prompt on “Tenno”)