Những bài hát của ca sỹ "Ken Hirai"
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Kimino Kodou Wa Kiminishika Narasenai (Drama Version)
Ken Hirai
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Woman Wnohigekiyori
Ken Hirai
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I'm Your Dog
Ken Hirai
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Okina Furudokei (Less Vocal)
Ken Hirai
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Style (Instrumental)
Ken Hirai
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POP STAR / fake star (MASH UP version)
Ken Hirai
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You Are The Sunshine Of My Life
Ken Hirai
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Itoshiki Hibiyo The Repose of Souls
Ken Hirai
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Pop Star (Less Vocal)
Ken Hirai
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Kanashiinowa Kimidake Janai
Ken Hirai
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Sing Forever (Less Vocal)
Ken Hirai
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Bye My Melody (HALFBY's music for momo REMIX)
Ken Hirai
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Itoshikihibiyo (Less Vocal)
Ken Hirai
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Kimino Sukinakoto (Less Vocal)
Ken Hirai
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Run To You
Ken Hirai
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楽園 (Lakuen)
Ken Hirai
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Fake Star
Ken Hirai
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瞳をとじて (Hitomi wo Tojit)
Ken Hirai
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鍵穴 (Kagiana)
Ken Hirai
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Grandfather's Clock
Ken Hirai
