A friend of ours just got my husband and I hooked on sashimi. I've always had an aversion to uncooked meat and fish but I am mad about raw tuna. It has become our nightly appetizer and I whip up a mean wasabi. My husband isn't happy unless he feels the burn.
Tuna is also my favorite sashimi. It's fresh and natural unlike the salmon which is fish farmed. Powdered mustard can substitute for wasabi. I like the rice but sushi has too much of it.
These days most restaurant tuna for sashimi has been flash frozen at very low temperatures to keep it at it's peak. So it can be shipped inland. This also kills of any bacteria.