That gyuto is something special indeed. I've never been that excited when I saw the shape and profile of other Watanabe gyuto: they always looked rounder and blunter at the nose. This one looks like it might even have a bit of a flat spot out near the tip. Did you tweak the profile at all? The way that you describe it being robust yet lasery makes me think Shigefuesa (but the profile on yours looks better). A well-done partial convex on a thick blade is a thing of magic. Anyone that has experienced one knows what I'm talking about, and anyone who doesn't should by this while I still have will-power and find out!
I've been playing with Piton's Kato for the past week plus, and I know exactly what you're talking about(now). I actually don't want to pass it on to the next guy. It's THAT good.
That Watanabe looks fantastic. Congrats to the new owner.
The AI does not love you, nor does it hate you, but you are made out of atoms it might find useful for something else. - Eliezer Yudkowsky