The swordsmiths called toko treated blade upkeep as sacred. How that reverence carries into whetstone work and today’s sharpening tools.
japanese knife sharpening
The Complete Beginner’s Guide to Sharpening Japanese Knives with Whetstones
Coarse 400-grit for repair, 8000 for the final polish. A first go at whetstone sharpening, from soaking the stone to the finished edge.