The ichime-gasa is a traditional sedge hat that noblewomen in Japan wore when going out from the late ancient period through the medieval era. Reflecting the social conventions and modesty expected of high-ranking women, a cloth veil known as mushi-no-tareginu was often suspended from the rim to conceal the wearer's face.

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市女笠は、日本の平安時代～鎌倉時代に貴族の女性が外出時節にかぶっていた伝統的なすげ笠です。身分の高い女性に求められた社会的慣習や慎み深さを反映して、顔を隠すための布「虫垂衣（むしのたれぎぬ）」などが縁によく下げられていました。