Izarimachi - Izaribata

Japanese: いざり機 - いざりばた

…However, this time, unlike the previous method, the warp threads are stretched to the desired length and one end is tied to a tree or other object, and the other end is connected to a waist rest worn around the weaver's waist, and the weaver proceeds from the front while weaving. The tension of the warp threads is maintained by the strength of the weaver's waist, and since the weaver sits on the ground and weaves like a sieve, this method is called an "izari loom" in Japan. This type of loom is also found in West Africa, India, Indonesia, and other places, and is also seen in Ainu looms. …

From [Jiki]

…A hand loom believed to have been used in Japan from around the 5th century onwards, it was also called an isari loom, a shita loom or a jindai loom. Older primitive looms did not have a loom stand and the reed was at the very back and was used to make the width and spacing of the warp threads uniform, but in the ji loom, a warp winding device was attached to the loom stand, making the back higher, and the reed was placed in front of the heddles and used for beating the weft. …

From [Loom]

…The English word for reed is "reed," but the reeds in Japan at that time were made of bamboo. This loom is called a "zariga" (sitting) loom, and is classified as an inclined loom among organic looms. The primitive looms were used outdoors, but the zariga were used indoors. …

*Some of the terminology that refers to "Izari-ki" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ただ今度は前と違って，望むだけの長さの経糸を長く伸ばして立木などにその端を結びつけておき，片方の端は織り手の腰にまわした腰当に接続し，手前から織り手自身が織りながら進んでゆく方式である。経糸の緊張は織り手の腰の力によってなされるわけで，織り手は地面に腰をおろして，いざるようにして織り進んでゆくところから，日本ではこの方式を〈いざり機〉と呼んでいる。この方式のものは西アフリカやインド，インドネシアなどにもあり，アイヌの織機にもみられた。…

【地機】より

…5世紀ころから日本で使用されたとみられる手織機で，いざり機，下（した）機，神代（じんだい）機とも呼ばれた。これより古い原始機では機台がなく，筬（おさ）はいちばん後方にあり，経糸（たていと）の幅および間隔を一定にするために使用されたが，地機では経巻具（たてまきぐ）を機台に取り付けて後ろを高くしてあり，筬は綜絖（そうこう）の前方に置かれ，緯（よこ）打ちに使用される。…