After I broke my arm in Okinawa, I didn't feel like doing much, but still had another day. I had never been to the movie theater in Japan, but decided it was a good thing to do that day. The reason I hadn't gone before wasn't because of the language - many movies are in English, with Japanese subtitles. The reason is the cost! I'm rather frugal, some would say cheap. The cost to see the afternoon show was 1800 yen. With my arm hurting, and not wanting to stay in the hotel, I paid to see "Best Seller", mainly because it was the next available English movie. It is a 2016 movie known as "Genius" in the English market. I hadn't heard of it before but it was pretty good. Have you seen it?
I don't know about other theaters, but this one had no concession stand, no popcorn or boxes of Good n Plenty. There was a drink machine. The theater was clean, but a little old. There were only a few people in the audience. One kind of strange thing (to me) is that Japanese people stay seated until all of the credits at the end of the film have finished.
If you break your arm on vacation, I recommend going to the movies!