To start learning Rof-Mao - 一撃 chords, build your understanding on these basic chords - Bm, G, A, B, Bm, D and A in sequence. To master the tempo, it's wise to start at 70 BPM before aiming for the song's 142 BPM. With D Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.