To jam and learn the simple chords for イツエ - 海へ還る chords, practice playing Bm, G, Em, C, D, A, Bm, C and G in sequence. A strategic approach would be to train at 49 BPM initially, and then accelerate to the song's tempo of 98. With the song's key of G Major, set your capo to fit your vocal range and chord choice.