According to Nihonshoki (Chronicles of Japan), it seems to be one of the reasons why Soga no Emishi was executed on the occasion of the Taika Reforms (Great Reformation of the Taika era) that he was conceited to make his children called with the honorific naming 'Miko.'
日本書紀によれば、大化の改新の折に蘇我蝦夷が誅された理由に、自身の子を「みこ」と尊称させるなどの不遜があったことなどが理由のひとつとして見える。