Ken Hirai 10th Anniversary Complete Single Collection '95-'05 Utabaka
THE STILL LIFE
gaining through losing
un-balanced
Stare At
THE CHANGING SAME
Ken Hirai Singles Best Collection UtaBaka Two
あなたになりたかった
JAPANESE SINGER
Ken Hirai 15th Anniversary c/w Collection '95-'10 "Ura Utabaka"
SENTIMENTALovers
FAKIN' POP
LIFE is...
Ken's Bar II
Nonfiction - EP
Ken's Bar III
Missin' you - It will break my heart - EP
#302 - EP
Kokuhaku - EP
Aishiteru - EP
Candy - EP
KISS OF LIFE - EP
LAKuEN - EP
half of me - EP
Kiminosukinatoko - EP
fake star - EP
Ken's Bar
Canvas / Kimi Wa Suteki - EP
Todokanaikara - EP
LOVE OR LUST - EP
Strawberry Sex - EP
Boku Wa Kimi Ni Koio Suru - EP
Soredemoshitai / Onnajisamishisa - EP
Mahoutte Itte Iikana? - EP
Ookina Furu Dokei - EP
Elegy - EP