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Most members of the kitchen knife forums sharpen knives by hand on stones, including traditional Japanese knives. Some are trying to use system like the one posted here but it can can only be used...

it is made for knife sharpening, but for its price one can get a full set of stones and learn how to hone IMHO.
Just look at the price of the accessory stones I find it crazy expensive...

I saw this one awhile ago but figured it is not worth posting , I am not convinced it will work well for razors, you know right pressure etc.
Also it can't be used with naturals so for those that...