To learn 下田逸郎 - 泣くかもしれない chords, your practice should emphasize these chord progressions: A, Ab, A, E, A, Abm, A, Ab and E. Start with a comfortable 45 BPM and as you become proficient, aim for the song's BPM of 90. Given the song's key of Db Minor, adjust the capo to align with your vocal range and chord preference.