Songs

• cry and smile
• egao
• Grotesque (グロテスク)
• OST Boku no hatsukoi wo kimi ni sasagu
• 瞳をとじて

Ken Hirai

Other Musicians

• Ragheb Alama
• Vicente Fernández
• Veronica Maggio
• Hamada Helal
• Annett Louisan
• Mohsen Chavoshi
• Gilbert Bécaud
• Alexis Y Fido
• Adriana Calcanhotto
• Asking Alexandria