Cork, the material keeping forest green

Cork material is bark of unique oak tree "Quercus Suber" which grows in western Mediterranean countries. Cork is valuable forest resources as other lumbers are, but cork differs from lumbers on the fact that cork is harvested without felling trees down. The trees are firstly stripped to harvest their barks at 25 years old, afterward, repeatedly stripped every nine years to finish their 250 years lifetime, and then the next trees are planted to maintain the reproduction cycle. This is why cork is called the material keeping forest green.

Cork wholly differs from lumbers on its physical properties, too. Cork is composed of micro cells filled by air which exist 30 millions per cm3, while lumber is fibrous material. Cork's distinctive features such as lightness, resilience, thermal & acoustic insulation, high friction, and waterproof, all depend on the micro cell structure of cork.


The CORK+ project, developed by Nagayanagi Co., Ltd, one of the oldest cork companies in Japan with design direction by Aya Koike, is intended to install these excellent features of cork into our daily life.