The ones I carry are different from the ones sold out of Japan that were designed to work well with Lie Nielsen's A2 Steel.
The ones sold here are designed to work with Japanese steels. The bond used seems to be different from the exported model.
10% discount for getting 3 or more items.
Diamond Reference Plate 29800JPY
Set 1: Woodworking set (1000 3000 8000 + Stone Set Holder) 24600JPY
These were introduced to the US market prior to Japan as an experiment.
My friend who visited me just couple days ago brought a couple with him, and I had the chance of trying them. I have been hearing from all of you how good these are, and WOW, you guys were right. This is one of the best synthetic stones I have ever experienced! Mizuochi-san from Iwasaki razor is finishing the Iwasaki razors with #30000 (altho it is more like cosmetic finish rather than practical), and the dai maker Inomoto-san is recommending as well.
It is not as hard as I have been hearing, very similar to Sigma stones, oily smooth yet quite aggresive. Also, because it is backed by the glass plate, when it gets thinned, you don't have to worry about it warping or breaking, you can use it till the very end.
Another good thing about this stone is that it is quite light, so the shipping will be cheaper than the professional series.