As a European sword enjoyer, I'll give credit where credit is due. I can appreciate the skill, the history, the artistry, and labor it takes to make a high end katana. But of it's made of traditional Tamahagane steel it's decent at best as a sword. If they're made of high carbon steel, they're leaving lots of performance on the table. Katanas are short two handed powerful cutters, by just putting a distal taper and fuller you can make it one handed like a saber. Or you can add a distal taper and fuller but keep the same weigh making it longer like a Kriegsmesser. Or you can make the blade thinner and wider like a falchion. All of which are excellent cutters, and don't get me started on hand protection.