In the early Showa period (1926-1989) in Japan, detective Mamiya Mugen solves weird cases.In the early Showa period (1926-1989) in Japan, detective Mamiya Mugen solves weird cases.In the early Showa period (1926-1989) in Japan, detective Mamiya Mugen solves weird cases.
The film was funded through a successful crowdfunding campaign that was launched in 2015, which raised 1,450,000 yen (about US$13,600) for the film's production.