Your cart is empty.
Add something from the shop.
NIYODOGAWA, KOCHI
Sustainably made charcoal from Niyodogawa's oak forests. Each grade is crafted for a specific purpose — from tea ceremony to under-floor heating.
THE FOREST
The forests around Niyodogawa have been worked by local people for as long as anyone can remember. Oak, bamboo, and shii grow together across the valley slopes, managed in rotation — harvested selectively, never cleared.
Sumizumi's charcoal operation is part of the Niyodogawa forestry cooperative. The harvest is subsidy-adopted, which means the cooperative qualifies for government support because the land management meets certified sustainability standards. Taking from the forest is part of keeping it healthy.
THE GRADES
Tea ceremony · High-end cooking · Gifting
Our flagship grade. Long burn time, almost no smoke, clean white ash. Cut from mature kashi oak in Niyodogawa's managed forest.
Cooking · Heating · Crafts
A versatile mid-grade charcoal from shii wood. Reliable burn, moderate heat output. Excellent value for regular use.
Outdoor grilling · Restaurants · Events
Purpose-built for high-heat grilling. Lights quickly, maintains steady temperature, no chemical additives.
Traditional under-floor moisture control
Placed beneath tatami and timber floors to regulate humidity, deter pests, and reduce odour. A long-standing technique in Japanese construction.
Interior plaster · Natural wall finishes
Finely milled charcoal powder mixed into plaster for walls and ceilings. Absorbs moisture and VOCs. Visually distinctive dark grey finish.
Deodorising · Soil amendment · Wellness
Made from locally sourced bamboo. High surface area, strong deodorising and moisture-absorbing properties.
THE PROCESS
Charcoal-making is slow, attentive work. The same earthen kilns have been used in this valley for generations. Nothing is rushed.
Mature oak, shii, and bamboo are selectively felled from the cooperative forest. Only what can regrow is taken.
Logs are split by hand and air-dried for several months. Moisture content determines burn quality.
Dried wood is stacked vertically inside the earthen kiln. Arrangement affects airflow and, ultimately, grade.
The kiln burns for five to seven days. Temperature is managed by adjusting the flue opening — a skill passed down over decades.
When the smoke turns white-blue, the kiln is sealed. Charcoal cools slowly inside over several days.
Charcoal is hand-sorted by density, length, and surface quality. Each grade is packed separately and labelled.
WHOLESALE & B2B
We supply restaurants, construction firms, architects, and retail buyers. Minimum orders, lead times, and custom grades available on request.
Get in Touch