The following are professional items specifically for polishing swords. They are therefore not identical with the more commonly available waterstones. In addition, some of the items are heavy; carriage costs are included in the price.
Please note that natural stones are subject to availability. Uchi-gumori is particularly difficult to get hold of, since the quarry supplying it has been exhausted. It is therefore advisable to enquire before ordering.
In order to keep shipping prices down, and thus the cost to you down, we will ask our Japanese supplier to ship them directly to you.