Craftsmanship that strides together alongside its environment.  Tanihata

Kumiko-Ramma Lattice Slide Door Tanihata Co,Ltd.

  • Craftsmanship that strides together alongside its environment.
  • Japanese traditions that have over a vast period of time come to connect "people" and "nature.
  • We strive to be a collective of craftspeople
  • who are grateful for the materials
  • given to us by the beautiful land,
  • as we continue to stride together alongside nature
  • Kumiko Ramma Tanihata

Our contribution to environmental protection

We are committed not only to making high quality products,
but also to a manufacturing policy that takes account of environmental conservation.
As wood and electricity are absolutely essential for Kumiko production,
preserving the environment is part of our mission.
reforestation staff training

Efficient use of sawdust and shavings

Wood-burning Stove CO2 reduction

Valuable natural wood resources

Eco-friendly use of our wood-burning stove
Our factory has a wood-burning stove that uses sawdust and shavings that would otherwise be disposed of as waste.

It is suitable for our factory as it has a large capacity fuel container that means it does not need to be refilled frequently.

The stove also helps to reduce CO2 emission, as it burns chips and shavings as they are. There is no need for processing into pellets.
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Handing over to farmers for recycling Sawdust Shavings

Handing over to farmers for recycling Sawdust Shavings

Using sawdust and shavings from Kumiko manufacturing.
Sawdust and shavings left over from making Kumiko and sliding doors, are given to dairy farmers for use as bedding in cowsheds, then ultimately sold as compost.

It is becoming harder for farmers to obtain natural wood sawdust as many wood works are using artificial or laminated wood that contain adhesive.

In the past, natural resources were actively recycled until the materials were no longer of use. Nowadays we are aware of the importance of being eco-friendly and using natural resources sustainably.


Manufacturing products with natural wood means a lot.
It takes time to manufacture our natural wood products, and also to master the skills of Kumiko wood work.

Although the use of processed wood may be advantageous in terms of efficiency and cost, according to my experience, making products from natural wood means that society is actually making more sustainable use of resources.

Tanihata is aware of conserving the environment, using naturally grown wood and valuing natural resources and even recycling sawdust and wood shavings.
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CO2 reduction and saving electricity

Use of LED lights

Use of LED lights

All tube lights were exchanged for LED lights in the headquarters and factory in May 2011
All tube lights in the headquarters and factory were upgraded to LED lights, while other small light bulbs had already been replaced.

The use of LED lights has decreased CO2 emissions by two thirds as compared with previously used tube lights. LED lights also use less electricity and have a ten year life, resulting in significant cost saving.
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Window installation to improve natural lighting

Window installation to improve natural lighting

To reduce the use of electricity in the factory, more light was let in when an acrylic window was fitted in the northern wall.
A sunlit work area has improved staff satisfaction and work efficiency more than expected.
Measuring Light Intensity Using a Lux Meter
In fact, illumination has increased two fold since the window was installed.

The illuminometer showed that light intensity culculated at 8am on a coludy day, while it was higher at noon more than our expectation.

From experience, we realised it was better to set windows on the north side in order to reduce the use of electricity for air conditioning. Windows on the south or west, would increase the need for air conditioning. Another option would be to let light in from the roof.

It is recommended that natural energy sources be fully utilised, including sunlight and heat from the sun, and wind, and that an insulation system be installed.

Also, we continue to use some old equipment that does not need electricity, thereby contributing to our eco-friendly manufacturing.
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Solar Panel Against Nuclear Power Electricity Supply

Installation of highly efficient solar panel

At the time of the Great East Japan Earthquake on 11th March 2011
At the time of the Great East Japan Earthquake on 11th March 2011, I volunteered to help people who were evacuated from the Fukushima area to Toyama, and visited Fukushima on the 16th and 17th of March. Building friendships with these people, I learned what is important in life.

Since visiting Fukushima in 2011, I have been opposed to the generation of atomic power.

Creating a highly contaminated area of 1,595 square kilometres, the damaged nuclear plant still has a serious impact on the people affected. As a Japanese, this makes me feel resentful.

In March 2015, after four years of planning, a solar system was finally installed on the roof of our factory to supply our electricity needs. Even though the solar system was very costly for our small company, it was worth it.

I do not want to criticise companies or people concerned with nuclear power plants.

There is no going back to life without electric power, and indeed, it was our dependence on electricity that brought about the generation of nuclear power. Fifty years from now, the population of Japan will be less than 90 million, and half the population will be over sixty. This means Japan will become a small nation at the edge of a growing world.

In Germany, home owners, the public and corporations work together with local and state government to address the challenge of environmental issues.

It is our hope that Japan will also be part of this effort to ensure sustainable use of resources with people working together, mindful of the lessons learned from the 2011 earthquake. At Tanihata, we are committed to protecting the environment.
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Power Saving with Monitoring power consumption.

Visualization system of electricity use

To improve our awareness of environmental conservation, the amount of power generated by the solar panels on the factory roof, has been recorded since late March, 2015.

In May 2015, 4,875KWh were generated, while power use was 5,760 KWh

Power produced from the solar panel covered 85% of our total power use.
With a little more effort at using electricity carefully, 100% of our energy needs could be met.


Building awareness to save energy
Monitoring devices in the factory record electricity use and also send out an alert when use above a certain limit occurs. This system enables our staff to be more aware of the need to save energy.

In particular, reducing power use of dust-collecting machines, contributes considerably to our effort to reduce total consumption by 50%.

Just the simple act of closing the hatch of dust-collecting machines, reduces power consumption by 20%. Please try it and see the outcome. If you have more machines at your factory, and then you can reduce the more amount.

The total amount of CO2 reduction for three months was 5,871kg. This is equivalent to 2,641 litres of petrol, or 418 trees.

It was found that awareness of saving energy, was directly related to CO2 reduction.
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carbon neutral

The relationship between wood and CO2

Sustainable energy use in the manufacturing process.
Carbon neutrality refers to the principle of burning wood without increasing the amount of CO2.

This means that when wood burns or mould forms, the level of CO2 in the air remains the same. Trees grow through photosynthesis, taking in water from the soil and CO2 from the air, and releasing water and CO2 when mould is formed.

In the past, it was not understood that burning wood was related to increasing CO2. In fact, combustion of fossil fuels such as petrol and coal, produces large quantities of CO2 and is a major source of greenhouse gases.

It is however, environmentally friendly when renewable biological resources like wood are used, but not if petroleum-based materials are used.

Considering the amount of petrol used in the felling, delivery and processing of wood, we are aware that mass production and consumption is not ecologically sound, even though the use of wood tends to be eco-friendly.

Our valuable wood materials have been sourced from trees that have grown over decades and centuries. It is inevitable that Kumiko production uses natural resources. Having said that, and in appreciation of natural resources, it is my sincere desire to make long lasting products that can be handed down from one generation to the next, minimising left over and waste materials from the manufacturing process, and utilising such materials as fully as possible.
Nobuo Tanihata, President
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Woodwork and environmental conservation activities - Our commitment to protect the local environment
Native forests of Tateyama Cedar and Swamp Cedar in Sugisawa, are designated as a national natural treasure.

Swamp Cedar forest in Sugisawa, Toyama, is shown in the above picture. It is said to be the only area where Japanese Cedar can grow at such a low altitude. The Sugisawa Swamp Cedar forest is located near the Sea of Japan (just 100 meters far from the coast), which at the bottom of the sea the old gown forest has been remained for ten thousands years.

A group of Cedar clustered together in the water with a large variety of tropical and montane plants, is an unusual sight.

After World War II, there was a large Cedar forest covering 130 hectares, most of which was replaced by rice fields during the period of national modernisation. Now local volunteers are supporting the conservation of the remaining Cedar forest for future generations.

Swamp Cedar forest in Sugisawa has survived thanks to the efforts of local people.

Tanihata will continue to address environmental problems brought about by changing lifestyles, maintaining a responsible position in respect of our use of natural resources in Kumiko making.
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