To learn Ichiko Aoba - Mr Sun chords, these are the chords to practise in sequence: Gb, Bbm, Ebm, Abm, Bbm, Eb, Am and Bb. A strategic approach would be to train at 91 BPM initially, and then accelerate to the song's tempo of 182. Tune your capo to accommodate your vocal range, referencing the song's key: Ab Major.