Let's start jamming Keiichi Okabe - The Tower chords, familiarize yourself with these chords - C#m, F#, Bm, Em, G, E, Bm, Em and Bm in sequence. For best results, commence at 40 BPM and progress to the song's BPM of 80. With G Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.