(According to Norinaga MOTOORI, the official post called 'Naiju' first appeared in the Tenkanhen of "Rites of Zhou," and children called 'doju' already existed in Japan in the era of the Emperor Ankan ("Rekicho Shoshikai" (commentaries on Imperial edicts in the Shoku Nihongi)).
（本居宣長によれば、『周礼』天官篇に「内豎」という官が初出であり、日本でも安閑天皇の時代には、これを元にした「憧豎」と呼ばれる童子がいたと説いている（『歴朝詔詞解』）。