Is Bokoku Joucho a nationalist song though? From me it doesn't seem to be about JAPAN in an international context, but rather that the person Ringo is longing for is of the same the "motherland" but they nonetheless cannot meet...
"moshi mo nozomi ga kanau to shitara kotoba wo kawashitai
boukoku datte onaji da mono"
And according to this blog, the guy thinks it's about Ringo and her child? IDK. But I think saying it's a nationalist song just because the word "bokoku" is used is a big stretch.
http://blog.livedoor.jp/r_i_n_5/archives/51283793.html