A pothook. A device that enables a pot nabe or tea kettle tetsubin to be suspended over a sunken hearth, irori. It was called jizaikagi (lit. 'free hook') because the pothook was adjustable, allowing a pot to be lowered or raised away from the fire as required. The most basic type consisted of a piece of rope from which the pot was suspended, tied to one end of a freely suspended wooden or metal element called saru. The loose end was passed over a beam, and then threaded through a hole in the other end of the saru, and knotted to the hook kagi which supported the pot. The drag tension on the rope as it passed through the saru kept the pot at the desired height; the height could be adjusted and the tension could be relaxed by changing the angle of the saru. The saru became a readily recognisable part of domestic architecture as it was often decoratively designed in the form of a fan or a fish, or the mallet of the god daikoku, which was believed to bring prosperity. More sophisticated jizaikagi used two bamboo or metal poles takesao but they also relied upon the principal of drag tension and the use of the saru. It is not known when the jizaikagi was invented but it was already in use in the Muromachi period. It was used in service buildings, vernacular houses minka and tea houses chashitsu. It is said to have been introduced into tea houses by Takeno Jouou (1502-55), inspired by one he had seen in a rural house.
Often abbreviated to jizai, it also had a variety of local names including kagidoko (Nagano Prefecture), tsurikagi (Ishikawa Prefecture), kagizuru (Gifu Prefecture), and oansama (Chiba Prefecture).
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