It is not simply about penmanship, but I do agree that the chisel work is rudimentary. It is not worthy of ridicule, nor of impassioned debate. This style of engraving is not at all uncommon, but I'd prefer it on a tang rather than on a blade face, especially if the knife is intended to be artistic.
Please go talk with Mr. Kato about his inscriptions and ask him why he does not see fit to spend more time on it, and perhaps avoid trying to crudely demean him on a forum he does not read (while accusing others of being rude to you). Perhaps you'll get a satisfactory explanation from him, and perhaps you won't. If you care enough to post about it on a forum that seems to be in a language that is not your first, certainly you can find the energy to ask him or an associate directly. If you wish to conduct yourself petulantly and truculently as it appears, perhaps you are not qualified to comment on others' politeness, or their upbringing.
Please go talk with Mr. Kato about his inscriptions and ask him why he does not see fit to spend more time on it, and perhaps avoid trying to crudely demean him on a forum he does not read (while accusing others of being rude to you). Perhaps you'll get a satisfactory explanation from him, and perhaps you won't. If you care enough to post about it on a forum that seems to be in a language that is not your first, certainly you can find the energy to ask him or an associate directly. If you wish to conduct yourself petulantly and truculently as it appears, perhaps you are not qualified to comment on others' politeness, or their upbringing.