When asked about any interesting episodes which happened during the filming, Suda revealed that Oguri treated them to delicious food and they even sang a Gintama-themed song which was included in the opening of the movie. Suda also said that Hashimoto had many scenes which were unimaginable for an idol to do such as picking her nose or vomitting, she did them happily even though she was quite embarrassed at the same time.
Nakamura who plays Kondo Isao, said that he was almost naked for most of the filming during summer last year so it wasn't too hot for him. However, as he was wearing a gown during the filming breaks, everyone started teasing him that he looked like a AV actor. Oguri also chipped in to say that when he first met Nakamura on the set, he was half-naked and supposed to be covered by bees which made Oguri so impressed by his courage.
On the other hand, Arai and Nanao "complained" about their action scenes being cut out from the movie to which Fukuda said that he tried his best when filming the action scenes. However, the cast continued their wave of "criticism" by saying that he kept checking Twitter and food blogs and had ambiguous standards on what was considered a OK scene. Fukuda also revealed that there was once when Domoto Tsuyoshi blew up at him for allegedly sleeping while he and Oguri was doing a fighting scene and questioned Fukuda if he knew what had just taken place.
Sources: Eiga.com / Oricon