crispula, it is considered a variety of Mongolian oak by some authorities,[2] and is widely distributed in Northeast Asia.

The leaves are dull green and have sharp serrations (jagged contours) that are more wavy than a typical oak.

The heartwood is dull brown, with excellent workability, colorability, high strength, and solid feeling.

In particular, Hokkaido varieties were considered to be of good quality, and they were called Japanese oak, and were exported and gained prominence.

The acorns of Quercus crispula contain astringent tannins and cannot be eaten as they are, but must be processed to become edible[citation needed].