I’m actually still in Japan but we’ve wrapped up most of our travel and so I thought I’d weigh in on the Japan questions that come up here often. As ever, for more detailed information, look at my bio on this site - there’s a link to my way-more-detailed blog.
Credit cards - taken almost everywhere, even for small purchases. The only exception is a store here and there and then the little food stands that are right at the tracks in the train stations.
English spoken - this was my biggest surprise. People who weighed in on this site and elsewhere indicated that there is plenty of English spoken and I have not found that to be true. Even desk staff at the hotels has often only spoken a minimum of English. It’s all worked out but it’s definitely made the traveling a little harder - and we were on a tour for the bulk of our travels so it didn’t matter that much. I feel like it would have been more difficult traveling around on our own. Lots of people chimed in with “You don’t need a tour” and I’m extremely glad we were on a tour.
Food allergies - this has been rough. Japan is definitely a society where asking for “special” treatment seems to be an insult and it seems like food requests qualify as special treatment. I think completely gluten free here would be difficult. My tour even booked me as gluten free and there were plenty of times I was served gluten or where I could not tell for certain. When we ate our meals on our own, without the tour, there was absolutely no way I could figure out what I was eating. And Japan does not dual-label any food items. I could not see the ingredients in any grocery items. I had planned to use my Google translate to scan labels but it was so slow and burdensome that I gave up. I have eaten A LOT of candy on this trip;)
Thoughts in general - Japan is gorgeous! I was not expecting to like Tokyo but I did! Even though Tokyo and Kyoto are vast and crowded, everyone is so orderly and polite - it’s awesome. The countryside is my favorite. Don’t leave out smaller towns if you’re planning a trip. Kanazawa was my favorite spot in our travels. About 88,000 people, charming architecture, strolling lanes and so green.