The word tomo means - same , or maybe the sense is more of a matching stone .
A nagura stone , mached with the stone . Classic term , reffers for a same material; or quality of stone .
In our case , or for honning razors the combinations are a mathematcal and , the possibilitys are countless
Mainly , the people use hard stone with softer tono , or softer stone with hard tomo , for raising almost pure slurry from the toishi - the base stone
Aways keep in mind , that in the right , upper corner , there is a field that is Advanced search When you whrite Tomo nagura there - you will have 10 pages of thousents opinions , pictures and information
This is more than sufficient , if you make efforts , to read them There isnt easy answers , for the most exquisite questions in this field , he he he he