The noble Akita. It is one of the best known and in my opinion, finest Japanese breeds of dog. Akita are known for being strong and independent, as well as being aloof with people they are not so comfortable with.
My favorite sushi (by this I assume you mean nigiri) is salmon. It is simple, buttery, and delicious to say the least, and for a good price too.
As for weirdest food, as the most well-known “strange food” and delicacy seems to be sushi, I shall go with a strange one (especially for foreigners).
Fugu, also known as pufferfish. Fugu, if prepared incorrectly, has a powerful neurotoxin that can kill you in a matter of minutes. It is concentrated in the fugu’s liver, eyes, and ovaries. It is rather expensive and rather popular for some people, perhaps for the thrill.