tags 618511 + unreproducible moreinfo thanks Hi!
Using the configration example from the submitter, I was unable to reproduce the bug with xplanet 1.3.0-5.1 package in stable (nor with the 1.3.1-1 I'm currently preparing).
Using https://upload.wikimedia.org/wikipedia/commons/e/e9/Location_map_Japan.png as replacement for japan.png I got the attached result (cropped to the text).
Best regards, Alexander