After being super secretive over the second third-week theatrical gift give out to attendees of Gintama: THE FINAL, the official Twitter account for the anime film revealed that the paired drawing was actually a self-portrait of Gintama creator Hideaki Sorachi.
The Hideaki Sorachi (gorilla) drawing is currently being given out alongside a drawing of Gintoki and Shinsuke in the third week of screenings for Gintama: THE FINAL randomly to attendees.
Gintama: THE FINAL opened in Japanese cinemas on January 8 and has so far made over 800 million yen (US$7.7 million) at the box office.