Your splendid analysis has made me understand why Kimigayo has such paradoxical chords, which I have wondered for a long time. What seems to be a D-based tune was forcibly distorted into the one as if it were C-Dur, with its beginning and end completely free of chord. I have been unable to accept this song, so I have sometimes tried to reconstruct it, mostly into d-moll like this: kzfaq.info/get/bejne/rM2le6mUtda1aWg.html