Plathora of Pan: a list of Japanese breads

Okazu pan: any pan with a savory filling

Curry pan: this is in the Okazu category. Curry pan is filled with a thick, paste like version of Japanese style curry and is fried.

Croquette pan: filled with deep fried mashed potato.

Yakisoba pan: a long roll filled with fried noodles and pickled ginger.

Spaghetti pan: similar to yakisoba pan, except with spaghetti!

Mentaiko pan: filled with marinated pollock roe and mayonnaise.

Kan pan: bread that is packaged in a can.

Koppe pan: a soft french roll

Kashi pan: bread with sweet filling inside

Katsu san: Included with the pan is this sandwich filled with fried pork cutlet.

Melon pan: a sweet pan (first image) that doesn't taste quite like melon but has many varieties including chocolate, strawberry, cream filled, green tea, custard filled, chocolate chip and coffee.

An-pan: a roll like pan filled with sweet red bean paste. There is also a fried version, which is referred to as a donut.

Cream pan: Similar to the an-pan, but filled with sweet cream flavored custard. Other flavors include peanut and chocolate.

Jam pan: very simply, breads filled with jam usually strawberry.

Koshian-pan: Topped with poppy seeds, stuffed with a smooth sweet red bean paste forced through a fine strainer

Uguisu pan: filled with green pea filling.

Korone pan: a counch shaped roll filled with cream or chocolate flavored filling.

Amashoku pan: a sweet bread roll.

There many many more pan including pan filled with sweet potato, raisins, walnuts, and pretty much anything else you can think of! I once ate a hotdog encased in a roll with ketchep and most likely mayo. That was different haha.