Shichirin

Shichirin being a compound word made up of the characters 七 (shichi or nana, "seven") and 輪 (rin or wa, "wheel," "loop," or "ring"), its coinage can be suggested through the individual kanji.

A popular story links the "rin" of shichirin to the Edo period currency denomination, the one-rin coin (albeit a different character, 厘).

These blocks of earth were then carved by hand or turned by machine before being fired in a kiln and affixed with metal hardware.

Shichirin are said to be made in roughly the same way today as in the Edo period, though both ceramic and diatomaceous earth versions were common.

The word "hibachi" is also (incorrectly) used in some parts of the United States to refer to Japanese steak houses or teppanyaki "iron hot plate" restaurants.