Yes, McDonalds. You can pooh-pooh it all you want, but in my humble opinion, McDonalds is a dependable, safe, reasonably priced, and yes, delicious option. There are no shortages of McDonalds in Japan, whether they be in a train station, mall, or just next to your hotel. Most of the options you are familiar with back home will be available in Japan as well. So enjoy that double cheeseburger and large French fries.