In Tokyo and Kyoto you will be overwhelmed with the options to eat a cheap and very good meal. Food vendors of all Asian ethnicity and more are available throughout the two cities especially in and around the train stations and within the major covered shopping doris(streets). If they accept credit cards they will have the appropriate stickers on the entrance windows/doors or most often next to the cash register as you enter. When given your bill you will usually go to the register to pay and not pay at the table unless you are in a posh establishment.

The good thing about the cheaper places(as well as the expensive ones)in Japan is that many restaurants display plastic or wax replicas of their dishes at the entrance. These replicas serve both to entice and inform and can be especially helpful for foreign tourists who do not speak Japanese like me

Aloha!

Japan is mostly a cash country. Most cheap to moderate eateries do not take credit cards. So bring cash. The cheaper places, like noodle or rice bowl shops have ticket machines outside he store where you buy your meal tickets with coins.

Are ATMs available throughout the cities?
Do most of the higher-end dinner restaurants accept credit card?

Thanks for your responses!