黒柿（KUROGAKI ： Diospyros Kaki）

Also known as black persimmon wood, an extreme rare wood that is difficult to find as it looks just the same as any other ordinary persimmon trees. In many cases, the market “accidentally” find the tree after carving, but many people refuse to purchase them as it is difficult to store and keep them in best quality. Scientifically, it is not proven why the wood become pitch black since the black wood is only been discovered from trees over age of 150 years and it can be imagined that it takes at least 100 years for the “Black pattern” to appear. Thus, it is difficult for researchers to continue and accomplish during their life span. Furthermore, the ratio to discover this black wood is 1 in 10,000.

鎌柄（KAMATSUKA ： Pourthiaea villosa）

aka “USHIKOROSHI” (牛殺)

which can simply translated as OX KILLER, derived from a theory where ancient farmers used this wood to produce nose ring for cows or as it may sounds cruel, they used them to kill cows. The wood itself is very strong and stiff like a rock.

ピンクアイボリー（Pink Ivory ：Peach-Colored Ivory）

Known as a “Peach-Colored Ivory,” Pink Ivory is distinguished by its characteristic pink-hued grain, in line with its name. The material is exceptionally hard, making it a challenging wood to work with. The pink portion of the wood can only be obtained from the heartwood (the inner part of the tree trunk), and there can be significant variations in color tone among individual pieces, rendering it a highly prized and costly commodity