Watch The Place Promised in Our Early Days (Kumo no mukô, yakusoku no basho) online

"The part about two teenagers building a plane that could get past a government-built radar system does seem a bit incredible, but this film does reflect on the incompetence of governments and how easy it is to get past them, so the required suspension of disbelief isn't really that big (I wish I found it hard to believe that a couple of teenagers could get past a bureaucratic governmental system in this day and age at all)"