That is what I thought at first too.
I live in osaka and can recommend shops to you. I've been to most if them in the kansai area. Are you looking for mainly knives or some scissors as well?
I' agree with DavidB, I've been an early adopter of SV and used both a Clamp sealer (Original Foodsaver) and my chamber vac (VP 112) and have never heard
I'd give Jon a call to help you decide.
Lol whoops, uraku dumb auto correct