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So's site is Japan Tool. The Atoma part is:

Japan Tool - Synthetic Sharpening Stones - Atoma Diamond Sharpener

Other places sell the Atomas too, such as Tools From Japan.

James.

In fact I think Atoma is the model. The maker is Tsuboman, according to my packaging. But yes, they are a Japanese company as far as I know.

I was first recommended the 1200 grit for Jnat...