Well, it’s been discussed, conjectured, debated many times here with no real conclusions.
I actually own one. It is signed Yoshihiro and that would be Seto Yoshihiro.
Of course, I’m not stupid enough to believe it was actually ,a de by Yoshihiro. I bought it knowing that and since most of these blades finish in the $400/600 range, it wasn’t a great risk. I wanted to know what they were.
... and I still don’t know for sure!
I’m pretty sure they aren’t Chinese. I’ve seen too many of them to know that. Not that the Chinese don’t have the skill, they do. But it wouldn’t be cost effective. Most of their cheaper blades are already in that price range, and, trust me, they are very different.
Those Komonjo blades have a nice Hada, a nice temper line, ububa, we’ll finished nakago. Comparing to the Yoshihiro pictures I’ve seen ,everything matches. Yasurime are correct, so is Nakago jiri, type of Hamon, type of Hada. Even the mei strokes look good.
...and yet, of course, they can’t be genuine, not at that price point.
I’ll add they cut like a razor, more than any upper tier Chinese blades I’ve ever seen. The only thing that could be improved is the quality of the polish.
So what are they? The jury is still out there. I believe they are Japanese but fakes probably smuggled out of Japan. Possibly iaito. Whatever, fake or not, they are very good blades, and at that price point, I can’t regret buying one.