Kukuri loincloth - Kukuri loincloth

Japanese: 括緒褌 - くくりおのはかま

…Also called nu-bakama. This style is said to have originated with the kukurio-no-hakama, which was established in 685 (the 14th year of the reign of Emperor Tenmu). The white hakama (later called ue-no-hakama) worn when visiting the court is front-opening and tied to the right side of the waist with a katawana (strap), while the sashinuki is side-opening and has strings attached to the front and back, with the front waist tied at the back and the back waist tied in front with a morowana (strap). …

From 【Hakama】

…It is made of cloth and is worn with kariginu. It is said to have originated from the kukurio no hakama (loincloth) of the Nara period. (5) Sashiko (sashi) hakama (sashi) This is a type of hakama made by replacing sashi-nuki with kiri-hakama, and its pattern and color are almost similar to sashi-nuki. It was worn with ikebana (a formal cap) and kariginu (a formal robin) as a substitute for sashi-nuki. …

*Some of the terminology explanations that mention "Kakuo Fundoshi" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…奴袴（ぬばかま）とも称する。この形式は685年(天武14)に定められた括緒褌（くくりおのはかま）に始まるとされている。参朝に際して用いられる朝服の白袴(のちの表袴（うえのはかま）)は前開式で腰を右脇で片羂（かたわな）に結ぶが，指貫は横開式で前後に腰(ひも)がつけられ，前腰を後ろで，後腰を前で諸羂（もろわな）に結ぶ。…