Besides the Banana & Bacon Sandwich, there's also more run-of-the-mill items like an Egg Sandwich, Honey Ham & Cheddar Sandwich, Clubhouse Sandwich, and Teriyaki Chicken Sandwich.
Here's what you can expect from each sandwich (pictured above from left to right):
Banana & Bacon Sandwich - Peanut butter, bacon, and banana on sliced bread. It carries a price tag of 450 yen (~$3.75 US).
Egg Sandwich - A Spanish omelet that includes spinach, potato, red bell pepper, edamame, and onion on sliced barley bread with some lettuce. It's priced at 440 yen (~$3.69 US).
Honey Ham & Cheddar Sandwich - Honey ham, red cheddar cheese, and green leaf lettuce on barley bread. It'll go for 480 yen (~$4 US).
Clubhouse Sandwich - Chicken, smoked bacon, soft-boiled egg, tomatoes, and green leaf lettuce plus the requisite three slices of whole grain bread. It's the priciest of the bunch at 550 yen (~$4.59 US).
Teriyaki Chicken Sandwich - Teriyaki chicken with teriyaki sauce, cheddar cheese, tomato, green leaf lettuce, and a wasabi mayo on sliced bread. The price on this one is 480 yen (~$4 US).
I guess it makes sense to offer the Banana & Bacon Sandwich in Japan, as it's likely customers there are not going to make one at home as you typically would here in the US.