Akai Ko-En – Mouretsu Rhythmics
Release Date: 2014.09.24
Akai Ko-En – Sekihan
Release Date: 2018.02.14
Akai Ko-En – Rinrin Ranran
Release Date: 2019.08.28
Akai Ko-En – Orange / pray
Release Date: 2020.11.25
Akai Ko-En – 純情ランドセル / Jyunjo Randoseru (순정 란도셀)
Release Date: 2016.03.23
Akai Ko-En – The Park
Release Date: 2020.04.15
Akai Ko-En – Imasara / Ko-shin / Sayonara Wa Iwanai
Release Date: 2013.07.03
Akai Ko-En – Kienai – Ep
Release Date: 2019.10.23
Akai Ko-En – Ko-en Debut
Release Date: 2013.08.14
Akai Ko-En – 熱唱サマ- / Nesshou Summer (열창 Summer)
Release Date: 2017.08.23
Akai Ko-En – Zettai Reido
Release Date: 2020.01.29
Akai Ko-En – Laundry de Hyouhaku wo
Release Date: 2012.05.09