Seiko Niizuma

- Ich Gehoer Nur Mir (From "Elisabeth")
- Musical Moments · 2008
- On My Own (From "Les Misérables")
- Musical Moments · 2008
- I'd Give My Life for You (From "Miss Saigon)
- Musical Moments · 2008
- Ai wo Tomenaide - Always Loving You -
- Andante · 2010
- Horns (Game Ver.)
- MementoMori Lament Collection Vol.1 (3) · 2023
- Seasons of Love (From "Rent")
- Musical Moments · 2008
- Last Night of the World (From "Miss Saigon") [with Ikusaburo Yamazaki]
- Colors of Life · 2019
- I Dreamed A Dream
- SEIKO - EP · 2015
- Never Enough (From "the Greatest Showman")
- Colors of Life · 2019
- Memory (From "Cats")
- Musical Moments · 2008
- The Voice in My Heart (From "Marie Antoinette")
- Musical Moments · 2008
- Man of La Mancha (Live Ver.)
- Live Moments · 2013
- Ito
- Andante · 2010

Alive: Arrive / Ametsuchinokoe - EP

2017
The Prayer - EP

2016
SEIKO - EP

2015
I Dreamed A Dream - Single

2015
Arigatou - EP

2012
Virgin Road - Single

2008
Ai wo Tomenai de - Always Loving You - - Single

2007

BORN: 1980年10月8日
GENRE: Vocal