A brief look about the real life aspects of Hisone to Masotan as well as a history lesson. Timestamps and Gifu Air Base website below.

http://www.mod.go.jp/asdf/gifu/

0:41 The real Gifu Air Base
1:39 The planes the dragons are disguised as
2:44 The history of the Japanese Self-Defense Force
5:19 Conclusion