Binchotan Activated Carbon
Water Filter

Ubame Oak

Authentic Japanese Binchōtan activated charcoal made from top-quality Ubame oak. The Binchōtan purifies water by absorbing pollutants in its many micropores. In Japan, it is also used for cooking rice, where it functions to absorb impurities from the water, creating better quality and tastier rice. It can also be used as an odour neutraliser around the house.
Functions Filters pollutants from water. In cooking rice, to emit a uniform heat. To neutralise odours.
Material Ubame oak from the natural forests of Wakayama, over 90% carbon
Cultivation From sustainable forestry, using only older trees. No pesticides or other chemicals used
Production Elaborate handcrafting, at least 10 days in a custom-made charcoal kiln
Dimensions 10cm x Ø 2,5-3,5cm.
Weight approx. 50g x 2 pieces
Storage life Can be used as a water filter for up to 6 months.


Note: As this is a natural product, there may be slight variations in dimensions and weight.


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€15.90 / 100g

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Binchōtan is a very popular activated charcoal in Japan, traditionally made from the wood of the ubame oak. The wood is burned at temperatures of over 1000°, which makes it much harder and more durable than conventional charcoal. In the Wakayama region, the tradition of making Binchōtan goes back over a thousand years, taking its name, meaning "Binchō charcoal" (備長炭), from a 17th century charcoal merchant from Wakayama. He perfected charcoal production and popularised it across Japan.


Before first use, the Binchōtan should be placed in boiling water for about 10 minutes and then allowed to dry completely. For water purification, simply place the Binchōtan in a water container for 6-8 hours. The micropores filter pollutants from the water and enrich it gently with minerals. It can also be used for cooking rice, by simply placing it on the rice before cooking. In addition to purifying the cooking water, the Binchōtan emits infrared rays, which exposes the rice to a uniform cooking temperature, lending it a better taste and texture. After about 6 months as a water filter, the Binchōtan can be repurposed as an air purifier for use around the house, where it absorbs odours and pollutants such as house dust. Finally, it is also common in Japan to crush Binchōtan with a hammer after prolonged use and mix it in small amounts with soil for houseplants for improved moisture retention and protection against harmful bacteria.


The wood is charred continuously for at least 10 days in a kiln custom-made for Binchōtan production, and the labour-intensive process is closely monitored by expert charcoal burners . The intense heat causes water to evaporate from the cells of the wood, forming millions of microscopic pores. Through these micropores, the Binchōtan naturally filters pollutants such as chlorine out of the water extremely effectively.


Place in boiling water every two weeks for approx. 10 minutes and then allow to dry. Can be used for up to 6 months to purify water, can subsequently be used to neutralise odours or as a plant fertiliser.

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