To jam and learn the simple chords for Mari Iijima - Ringo No Mori No Koneko-Tachi chords, practice playing D, Gm, C, F, D, Gm, Bb and C in sequence. A strategic approach would be to train at 61 BPM initially, and then accelerate to the song's tempo of 122. With the song's key of Gb Major, set your capo to fit your vocal range and chord choice.