Shichirin

The shichirin (; , literally "seven wheels") is a small charcoal grill.
Etymology.
"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). It is said that the "shichirin" was an affordable way to cook a meal because the amount of charcoal needed for each lighting only cost seven "rin."
Description.
The "shichirin" is a lightweight, compact, and easy-to-move cooking stove. Charcoal is chiefly used for the fuel. "Shichirin" are said to be made in roughly the same way today as in the Edo period. Old "shichirin" are mainly ceramic and many can be found in old houses. Most modern "shichirin" are made by heating diatomaceous earth, but the raw materials are not uniform. Some "shichirin" are made with a double inside and outside ceramic structure. The shape is mainly cylindrical, square, or rectangular, and the size also varies. Many varieties of "shichirin" are made for different uses. In the Kansai region, they are also known as "kanteki".
North American "hibachi".
In North America, small BBQ cooking stoves resembling shichirin are referred to as "hibachi" or "hibachi-style", which in Japanese refers to a small heating device which is not usually used for cooking. It has been suggested that these grills were confusingly marketed as "hibachi" when they were introduced to North America. 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.
Use.
Charcoal is commonly used as a fuel for a shichirin. For outdoor cooking, black charcoal is used. When indoors, Binchōtan is preferred. Binchōtan, a type of white charcoal, produces less of a smell when burned, can continue burning hotly for a longer time, and is less likely to flare up dangerously. As a cheaper alternative, sawdust charcoal may be used.