To learn Poppinparty - 夏に閉じこめて chords, your practice should emphasize these chord progressions: F#, Bm, D, A, D, Bm, G, A and Bm. Ease into the song by practicing at 47 BPM before reaching the track's full tempo of 95 BPM. Given the song's key of D Major, adjust the capo to align with your vocal range and chord preference.