Handmade Racers and Knifes

Hello everybody,

I'm visiting Japan for the second time in my life and I like the Japanese handmade knifes very much. So I'm looking for foldable handmade racers. It would be perfekt if it's possible to see their manufactoring. Unfortunatily I didn't found anything on the internet. Do you have any recommendations for me? Is there a special word for these racers?

I will visit the areas of:
Hokkaido
Sendai
Nagano
Osaka
Hiroshima
Kumamoto
Okinawa

Thanks a lot.

I am not sure what a racer is, but since you are talking about knives, did you mean, razor?

Sorry I meant razor. I think in Japan they call it "Kamisori".