I know it sounds like a funny question..I worked many years in restaurants some of them were in Japanese places..I remembered one place..Asakuma...the delivery driver who was from Japan on temp visa here in socali and worked where I was a cashier...I asked him..do you think ALL raw fish is Sashimi?..he looked at me like I was nuts and replied "you kidding me, of course its all the same!"..I replied to him..so you think all grades are the same..his reply "qualities different, but idea is the same..anyways..I just got done baking some halibut in some Lea & Perrins fish sauce and wondered "could I slice it when its raw very thin then add a few fresh squeezed lemon drops and make some sushi rice and seaweed wraps?..