It is characterized by its unique astringent color. It is easy to use because of its softness.
Perforated material. The boundaries of the sapwood are clear. The sapwood is pale grayish-white and the heartwood is pale grayish-green when sawn and darkens to greenish-brown to dark greenish-brown over time. It has the moderate firmness of a hardwood, but is soft to the touch. It is easy to process because it is flexible and has a fine grain with little distortion. In the past, it was used for clogs and drafting plates, and after the war it was used as aggregate for kotatsu turrets. It is used for cutting boards and sword sheaths because of its ability to prevent blades from rusting.