🪗 アコーディオン
An accordion is a bellow-driven [[instrument]]. It usually has a rectangular bellow and asymmetrical sides with keys sticking out on one side.

If the sides look symmetrical and the bellow is square, hexagonal or octagonal, it’s probably a [[concertina]] instead.

h4. Examples

* !post #2466981

h4. External links

* "Wikipedia: Accordion":[https://en.wikipedia.org/wiki/Accordion]
accordion