Never tried turkey sushi, but I have had chicken sashimi. They sear the outside of a chicken breast, slice it up thinly and then serve it with a bowl of ponzu sauce to dip it in. Many restaurants specialize in it and I never heard of any cases of salmonella resulting from it.
Most Japanese that I asked said that this was because of the quality of the meat and the caution used while preparing it and I tend to believe them. In general the fresh food that is sold in Japan is of higher quality than what we buy in the states. But then it is far more expensive and the Japanese seem to have an obsession for buying things that are high quality.