Uenokinu

Japanese: うえのきぬ

…For example, karigoromo (hunting clothes) evolved into kariginu. This idea was inherited until the Heian period, and it became a general term for high-class clothing, such as uenokinu (robe) and akomekinu (coat of kimono). However, at some point during the Heian period, the general term kinu came to refer to practical clothing worn under a robe or karaginu (cloak of kimono), and uchiki (cloth of kimono) and akome (coat of kimono) came to be simply called kinu. …

From 【Robe】

…The upper garment of the morning dress worn since the Nara period and its variations such as the sokutai and ikan. It is also called uenokinu. It has a stand-up collar, a two-width body, and long sleeves with half-width end sleeves at the back. …

*Some of the terminology that refers to "Uenokinu" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…たとえば〈かりごろも(狩衣)〉から〈かりぎぬ〉に発展したのなどがその例である。このような観念は平安時代まで受け継がれて，一般的に上級の衣服の総称となって〈うえのきぬ(袍)〉〈あこめきぬ(衵)〉などのように称された。しかるに，いつかこの一般的な〈きぬ〉という名称が平安時代からは袍（ほう）や唐衣（からぎぬ）の下に着る実用的な衣服をさすこととなって，袿（うちき）や衵（あこめ）をただ〈きぬ〉とのみいうようにもなった。…