http://www.sushifaq.com/sushi-grade-fish.htm I did a little quick googling. According to the site above, sushi grade tuna has been frozen at a particular temperature and for a particular period of time. This apparently kills any microbes.
Safety is relative, all raw foods carry a level of risk, but the risks are much higher for non-sashimi grade fish. First of all, sashimi grade is frozen very quickly after the fish is killed to preserve the flavors and freshness. The freezing process is also done in a way to kill any parasites. You have no idea how long it was until market grade fish was kept until or after freezing. Plus there is a big difference in the taste. The fish is quickly killed to prevent build-up of acids in the flesh for sashimi grade to protect the subtle flavors. In my opinion, it's just not safe all around. Spend the extra bucks and get sashimi grade.
Sashimi means "pierced body " in Japanese.
さしみをたべる。 "sashimi o taberu" means "to eat sashimi"
Deboning, sashimi, and paring are types of kitchen knives.
Sashimi is a technique of thinly slicing uncooked seafood and uncooked meat. It is Japanese in origin.
sashimi
The Japanese
The cast of Brooklyn Sashimi - 2011 includes: Akio Kon
The cast of Sashimi - 1999 includes: Andrea Pezzi as Himself - Host
Sashimi
The best selling sashimi in Japan is "maguro" tuna but yellow tail snapper is also a favorite.
sushi