To jam and learn the simple chords for Japan - Swing chords, practice playing Bm, G, Bm, D, Bm, E, Bm, F#m and Bm in sequence. Start with a comfortable 68 BPM and as you become proficient, aim for the song's BPM of 137. Tune your capo to accommodate your vocal range, referencing the song's key: D Major.