The Japanese domestic movie rankings for July 15th, 2017 to July 16th, 2017 were announced and Pocket Monster Movie 20 - I Choose You! got first place in the ranking despite some very good competition from Gintama and Cars 3. The movie was released on 368 screens nationwide and the opening weekend resulted in 436,000 ticket sales and 516,000,000 yen in revenue. This resulted in a 59.3% higher revenue for the opening weekend compared to last years movie Volcanion and the Ingenious Magearna.

In second place was the Gintama live-action movie starring Shun Oguri and it is based off of the Weekly Shonen Jump manga series written and illustrated by Hideaki Sorachi. It was released by Warner Bros. Pictures on July 14th, 2017.

Source: http://eiga.com/news/20170718/23/