Senyuu 軍歌：戦友

This is the most important and well-known of all the Gunka(Military songs).This is the most important and well-known of all the Gunka. It's probably not an understatement to stay that every Japanese soldier, and perhaps every Japanese back at home, knew this song. Its the main Japanese soldier song, of WW2.Originally written in 1905, a product of the Russo-Japanese war, the song was revived during the period of war hysteria in the 1930s, amid the first pushes into China. It was sung throughout the war and experienced immense popularity among civilians and soldiers alike.

ps: For those offended by this, I don't give a fuck. It's a historical document, so deal with it.