These are Umaibo, a snack beloved by children all over Japan. It’s made from puffed corn, kind of like one giant cheezie. They are really cheap, only 10 yen (10 cents), and come in all different kinds of flavors. The two above are salami and gyutan (which is cow tongue a sendai specialty. Other flavors are shirmp with mayo, teriyaki, wasabi (Japanese horse radish), natto (fermented soybean), spicy cod roe, chocolate, and caramel. I especially like the picture on the cow tongue umaibo.
Umaibo cat is dressed as Date Masamune, the founder of Sendai, and the cow is sticking his tongue out. How appropriate!