The title 'Tarashihiko' was held by the twelfth Emperor, Keiko, the thirteenth Emperor, Seimu, and the fourteenth Emperor, Chuai, although this title is believed to have come into use in the early seventh century, when it was used by the thirty-fourth Emperor, Jomei and the thirty-fifth Emperor, Kogyoku, both of whom are known to have existed, and added later to the twelfth, thirteenth, and fourteenth Emperors, raising doubts about the actual existence of Emperor Chuai (theory of Emperor Chuai as a fictional person).
「タラシヒコ」という称号は12代景行、13代成務、14代仲哀の3天皇が持ち、ずっと下がって7世紀前半に在位したことの確実な34代舒明、35代皇極の両天皇も同じ称号をもつことから、タラシヒコの称号は7世紀前半のものであり、12,13,14代の称号は後世の造作ということになり、仲哀天皇の実在性には疑問が出されている（仲哀天皇架空説）。