When asked to reflect on the filming of the movie which took place last summer, Ayase recounted that she had been stung by flies and gnats on 8 spots while she was at temples and in the midst of bushes that it was too itchy for her to sleep at night. It got so bad that she scratched herself until she bled. As for Tsutsumi, he revealed what Taguchi, Hamada and he had taken the same Shinkansen train to get to the filming venue but it just so happened that he was in another carriage while Taguchi and Hamada sat together. However, by the time they got to Okayama, Tsutsumi was wondering why his co-stars were not getting off the train and actually ran on the platform to check on them when he saw them in a drunken state. After Tsutsumi knocked on the window, Taguchi managed to get out of the train in time but Hamada actually rode the train all the way to Hiroshima which made the audience gasp in amusement.
Sources: Sanspo / Eiga.com