Smoked and Salted Salmon - how do I find and identify it?

I want to get hold of some smoked salmon, and I'd also like to try salted, for making onigiri.

I'm not having much luck looking in the supermarket, but whether that's because I'm bad at looking or because I'm in a rural area of Japan and they don't have it I don't know. So any hints on how to find it and what I'm looking for would be appreciated - especially pictures or what labels would likely look like since I can't read Japanese!