Daiko

Byou-uchi daiko are typically hollowed out of a single piece of wood. The preferred wood is keyaki due to its density and beautiful grain, but a number of other woods are used, grouped under the generic term meari (目有). Byou-uchi daiko cannot be tuned, and their sizes are limited by the diameter of the tree they are made from.
The typical byou-uchi daiko is the nagado-daiko (長胴太鼓, long-body taiko). It is roughly shaped like a wine barrel, and is available in a variety of sizes, from 1.0 shaku (12" in head diameter), to 3.0 shaku.

Our Japanese teacher invited us to her practice session. It was awesome.