As for the hosonaga for women, it is only written that 'there is no high neck of that kinu (clothes)' in a costume guide book, "Masasuke Shozokusho" (Masasuke's Notes on Court Costume) and thus it is barely known that hosonaga is not a sokutai sort of closed collar costume.
女性用の細長については、平安後期の装束解説書『満佐須計装束抄』（まさすけしょうぞくしょう）には「例の衣のあげ首なきなり」とだけ書かれ、ここから束帯の様な詰め襟でないことだけがかろうじて分かる。