Hyung-Ki Joo & Billy Joel: Circle

Childhood, an Album of 10 Piano Pieces (2021): I. The Little Prince

Childhood, an Album of 10 Piano Pieces (2021): II. Stardust

Childhood, an Album of 10 Piano Pieces (2021): III. Hiding the Tears

Childhood, an Album of 10 Piano Pieces (2021): IV. Remy's 1st Birthday

Childhood, an Album of 10 Piano Pieces (2021): V. Ancient Childhood

Childhood, an Album of 10 Piano Pieces (2021): Vi. Poème for a Snail

Childhood, an Album of 10 Piano Pieces (2021): VII. Wondering While Wandering

Childhood, an Album of 10 Piano Pieces (2021): VIII. The Girl Who Never Knew

Childhood, an Album of 10 Piano Pieces (2021): IX. Watching My Balloon Fly Away

Childhood, an Album of 10 Piano Pieces (2021): X. Childhood 1979

Chandeliers (2001)

Funk Yeah! for Four Hands (2024)

Suite for Piano (Star-Crossed), Op. 8 (2001): I. Innamorato (Arr. by Hyung-Ki Joo)

Suite for Piano (Star-Crossed), Op. 8 (2001): II. Sorbetto (Arr. by Hyung-Ki Joo)

Suite for Piano (Star-Crossed), Op. 8 (2001): III. Delusion (Arr. by Hyung-Ki Joo)

Soliloquy (On a Separation), Op. 1 [1997]