Wiki-Ebony

Ebony is a wood often used for kitchen knife handles. It is black in color, has a dense heartwood, and is used as a high-grade wood. Because of its high density, ebony excels in terms of solidity, durability, and water resistance. In addition to such performance, the black color and texture of ebony wood also give it an excellent design, and it has earned a high position among kitchen knife handles.

Related websites
Japanese Knife Handles Guide | KIREAJI
Essential Japanese Knife Care Tips for Durability | KIREAJI