noun
Refers to tuna as a food ingredient, commonly canned tuna used in salads, sandwiches, and onigiri. Not typically used for the live fish.
ツナ缶を開けてサラダを作った。
I opened a can of tuna and made a salad.
このおにぎりにはツナマヨが入っている。
This rice ball has tuna mayo in it.