Woah, 5 years. I’ve been using the Zwilling knives I use most often for almost 40 years. I like them fine, so I have no desire to replace, re-use, repurpose, exchange, etc.
If I had someone (like you, with an extensive collection of very different knives) that I could borrow some of those Japanese knives from, I’m sure that I would probably change my tune.
But because I don’t, and because I’m happy with my regular Western-style knives, I’ll probably never have a chance to try the Japanese or other knives all of you are so in love with.
Edit - I should also add that I use these knives a fair bit. They’re about 70 years old
The bottom knife is really heavy and I mostly use it when camping. The others are really nice for boning (top knife, very flexible) and general slicing (middle knife).
These three were all home made by my wife’s grandfather.