To learn Kazuko Matsumura - Kaettekoiyo chords, anchor your practice on these foundational sequence of chords - Eb, G, Cm, Eb, Cm, F, Cm, Gm and Cm. I suggest starting at a calm pace of 51 BPM, and as you gain confidence, approach the song's BPM of 102. Adjust the capo based on your vocal range and chord preference, keeping the song's key of Eb Major in mind.