Just an footnote: the "curse" Hirai is referring to here could either be Masakados curse against Japan OR the curse of the people(s) who were defeated by the Japanese Empire in ancient times. The book puts forth the latter explanation. However the anime makes it a bit ambiguous.
Found this video looking up trailers of Doomed Megalopolis. Cant find anything good on it. Just trying to find out via a "trailer" what kind of movie it is, and whether Im interested in seeing it. Cheers for the video though, gave me a bit of insight, and wanted to give a comment on it to help out.