On September 20, 2016, answering a question from a fan, Shinkai confirmed that the autographed paper put up for an internet auction was fake.
Okayama Prefectural Police announced on May 10 that they arrested a 32-year-old unemployed man from Hino-city, Tokyo, for selling fake autographed colored papers of famous Japanese anime/manga creators including Hayao Miyazaki (My Neighbor Totoro) and Makoto Shinkai (Your Name.) on internet auction sites.
Section this spring to investigate various internet crimes, and this is the section’s first arrest case.