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【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
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80 x 220 x 31 mm 1,392g Easy-to-use hardness
It remains sticky and is a versatile machine.
Siliceous slate from Umegahata, Ukyo Ward, Kyoto City, Yamashiro Province #6,000~24,000 grade The harder it is, the more practice it will require, but the higher the chance of fineness. Because of the round bottom continuous striations, it has a long cutting time of about 70% threshold, and the artificial grinding wheel grain size ratio makes it difficult to create a tasteless mirror-like surface, making it easy to bring out contrasts derived from differences in forge tangents, materials, and carbon content.
The blacker the stone, the harder and finer the stone tends to be. If it is hard, it will lose its self-sharpening ability, so depending on your purpose and level of skill, sharpen it while doing Kyonakuragake each time.
A natural whetstone produced in Yamashiro Province, located in present-day Kyoto City, which originated with the invention of the Japanese sword.
It has a history of nearly 900 years since the end of the Heian period, and is known as the most precise and prestigious whetstone among slate-based whetstones.
It was the most important military resource in the long-lasting sword era, and was under the control of the shogunate from Kamakura to the end of the Edo period.
In terms of values up until the early modern period, it was strongly characterized as an arsenal material, and in modern times it could be considered a uranium mine essential for nuclear weapons, so it needed to be strictly controlled.
It is said that the stone from Iyo Province was already distributed in the Setouchi Inland Sea during the Kofun period, and is famous as a master of the world's oldest and largest igneous stone system, which is said to be over 1,500 years old.
Our country's famous abrasive resources have the potential to completely transform a nation and a nation.
Because of its unique iron sand metallurgy, which had a much lower yield due to the lack of iron ore, and because it was a remote island in the Far East, the fact that it was the final destination for the introduction of iron was a fatal condition, like losing a limb in the creation of the Iron Age civilization.
History and tradition will prove that consumables that allow you to process harder, more tenacious iron products as you wish are Japan's most famous abrasive resource.
Despite its poor location, it became the oldest and largest wooden building in the world.
Despite being a latecomer to the countryside, in the Middle Ages they had already invented the world's best iron products, allowing the sword industry to continue for nearly 700 years.
Since most of recorded history belongs to the iron age, iron tools became our hands and feet, and were the very medium of use for making things.
Japan is today known as a nation of manufacturing groups, as it has been proven that Japan was already able to manufacture the world's strongest iron products and craft tools around 1,300 years ago, when Horyuji Temple was founded in Asuka.
It is true that in creating iron, he fought back against adversity, even the loss of a limb.
The backing of the famous whetstone resource, which is irreplaceable and precious, unique and authentic, has eliminated the rate-limiting decision of whether or not it can be sharpened during the development of steel with its maximum whetstone performance.
If we estimate Japan's various resources based on values up to modern times, we are a resource-rich country, even though 70% of the country is covered in forests.
However, because the Japanese archipelago is made up of five plates crowded together, in exchange for enduring numerous natural disasters, each region was allowed to take out grindstones, although the quality and quantity may vary.
Our hearts, which accepted the idea of being ruled by a majestic mountainous natural environment with both harshness and abundance (carrot and stick), eventually learned patience, cooperation, and compromise, and we foresaw the existence of 8 million gods (various resources and blessings) and the worship of nature, where we are grateful and thankful every day, and have sublimated it into the foundation of the Shinto spirit.
This is perhaps why we are able to pass on Japan's most proud strengths and charms, which are not limited to material well-being, such as being relatively tolerant of different cultures and religions, and being able to repeatedly absorb and integrate them.
Rückerstattung bei Nichtlieferung
