You can sharpen the flat chisel (hirato) and into (into), but for the round knife (marutou) you need to prepare the whetstone yourself. When I say machining, I don't think about it in such a complicated way, and I simply scrape the surface of the whetstone using the largest round knife.
If sharpened well, the chisel blade will pass through easily. I think it may not be fun until you get used to sharpening, but little by little you will be able to sharpen.
Before you know it, you'll be able to sharpen it to some extent.