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This beautiful little copper grater fits conveniently in the palm of your hand and is an essential tool in the Japanese kitchen. Known as oroshigane (卸金), it’s perfect to use for condiments such as ginger, daikon, wasabi, or garlic. Each tooth on the grater is carefully chiseled one by one by hand and then plated with tin for extra durability and rust prevention. The irregular arrangement of blades resulting from handcrafting is what makes the grated foods especially flavourful, as the moisture does not get separated from the fiber when shredded.

You’ll have to taste it to believe. This is your next grater.

Grate the vegetables by pushing them into the tool in a circular motion to create a fine paste.

Over time, the copper will change in color and develop a patina. This patina is harmless and will not affect the taste of your food.


In 1907 (40th year of the Meiji era), Kasahara Yasuri Seisakujo, the predecessor of Tsuboe Co. was founded in Tsubame City, Niigata Prefecture. When the founder, Kotaro Kasahara started manufacturing files, it is said that there were as many as 400 file factories in Tsubame City. The word “tsubo,” which inspired the company name TSUBOE, is derived from a name for a jar containing miso that was applied to steel during quenching to improve hardness.

The production of grating tools based on file manufacturing technology began when Eiji Kasahara, the third-generation owner of the company, who oversaw the production of grating tools. Through repeated prototyping, he understood the depth of Japanese cooking with its broad usage of “grating” techniques and derived the best arrangement of blades and optimal metal materials to support those practices best. This led to the development of Tsuboe’s grater products and laid the foundation for the company as a manufacturer specializing in metal graters we use today.


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