The first set of shorts aired around June 2013 as a promotion for the second Gintama film.
The original voice actors from the anime—including Kazuya Nakai (Hijikata), Kenichi Suzumura (Okita), and Susumu Chiba (Kondo)—reprise their roles for these bean forms. Gintama x Mameshiba Episode 5
A second collaboration titled Gintama: The Final x Mameshiba was released in 2020 to promote the series' concluding film. Anime: Gintama x Mameshiba - AniDB The first set of shorts aired around June