In the 17th century, the people of Japan have trusted Binchotan to purify the water. It may sound a little strange but it’s certainly the truth. Binchotan is a high quality activated charcoal that is made from Eucalyptus branches. It was specially combusted and slowly burnt in temperature up to 1000 degrees in 15 to 20 days to help completely eliminate impurities and achieve almost 100% carbon content.