Try discount ticket shops
If there's a discount ticket shop, called kinken shop, in your neighborhood or near places you go to, try find movie tickets there because they're cheaper. A movie ticket for an adult is 1800 yen, but usually at kinken shop, it's around 1,300 to 1,500 yen. It's a good deal if you're not going to see a movie on a movie day or ladies day when the movie is at 1,000 yen.
Kinken shops are almost every where in major shopping areas, such as Shinjuku and Ginza, and near train stations.