Những bài hát của ca sỹ "Ken Hirai"
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Woman Wnohigekiyori
Ken Hirai
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Boku Wa Kimi Ni Koi o Suru (Less Vocal)
Ken Hirai
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Kimiwa tomodachi (Soul Source Production Mix)
Ken Hirai
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Nonfiction (Less Vocal)
Ken Hirai
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Life Is... Another Story (Instrumental)
Ken Hirai
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Kimino Kodou Wa Kiminishika Narasenai (Drama Version)
Ken Hirai
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Ring (Less Vocal)
Ken Hirai
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It Will Break My Heart (-English Version-)
Ken Hirai
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Aozorasanka
Ken Hirai
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Canvas (Karaoke Version)
Ken Hirai
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I'm Your Dog
Ken Hirai
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Omoigakasanarusonomaeni (Less Vocal)
Ken Hirai
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Itoshikihibiyo (Less Vocal)
Ken Hirai
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Pop Star (Less Vocal)
Ken Hirai
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Sing Forever (Less Vocal)
Ken Hirai
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Style (D. O. I. re-M. I. X)
Ken Hirai
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Hitomiwo Tojite (Less Vocal)
Ken Hirai
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Kimiwa Tomodachi (Less Main Vocal)
Ken Hirai
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楽園 (Lakuen)
Ken Hirai
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Fake Star
Ken Hirai
