Research on Urushi

About Urushi

urushiis a natural resin extracted from the poison oak tree, found only in Asia. It has been used as a paint and adhesive since the Jomon period (about 10,000 years ago). urushiThe sap is produced by the poison oak tree to protect itself when it is damaged, and only about 200 grams of this precious natural blessing can be obtained from a tree that has been grown for 10 to 15 years. It takes about 5 months for a craftsman called a "scraper" to collect the sap from a tree that has been cultivated with care and attention. urushi

urushiThe coating film of "KURANEX" is so comfortable and warm that it is likened to a baby's skin. It also has a natural antibacterial and bactericidal effect, which is excellent from the viewpoint of safety and security. The unique sheen and texture that is created through continued use is something that only nature can produce, and chemical paints cannot. People naturally become attached to them and use them with care. Even if it deteriorates, it can be repainted and used for generations to come. It also fosters a mindset of taking good care of things and respect for ancestors. Although they have a strong image as luxury items, they can be used repeatedly and for a long time, and are in fact familiar objects suitable for daily use.

Document "Thinking about the Future of urushi"


Developed from the conventional process of Nayasi-Chrome
Our proprietary refining technology

High Dispersion Urushi "Kourin"

in detail

Resistant to shrinking and sagging

Spray-on Urushi "Sakigake"

in detail

Reki pigments that reduce brush marks

New Reki Urushi pigments

in detail

Special surface treatment process for strong adhesion of natural urushi to
glass, ceramics, metals, shells, etc.

Qualia Coating

in detail

Strong adhesion to glass, ceramics, etc.
No need for polishing, no need for primer treatment, no need for baking treatment

Glass Urushi

in detail

Jointly developed by "Sanwa Abrasive Industry" and "Tsutsumi Asakichi Urushi store"

Sanwa Urushi polishing materials

in detail

Kintsugi, Maki-e, Raden, Urushi Engraving
Unbreakable and long-lasting revolutionary whetstone alternative to needle charcoal

Asakichi grindstone

in detail