While the Takakura family initiated a book, "Various costume" of the late Kamakura period, specifications of Women's hosonaga and baby clothes hosonaga is explained differently, in the "Genchu saihisho" (Secret notes on the Tale of Genji) which describes annotations on the tale, compiled by Kawachi side (the family of MINAMOTO no Chikayuki and others who worked actively on the research of "Genji Monogatari" (the Tale of Genji) mainly in Kamakura) of the same age, there was already found a mixture of baby swaddling hosonaga and the female garment hosonaga.
鎌倉後期の高倉家秘伝書『装束色々』では女性用の細長と産着の細長の仕様を別々に説明するが、同じ頃の河内方（源親行ら、主に鎌倉で活躍した源氏物語研究の家）の『源氏物語』の注釈の秘伝を集めた『原中最秘抄』ではすでに産衣細長と女性用の細長の混同が見られる。