• Yakusoku no Uta
  
• Yami no Hitsugi
  
• Yami Koso Utsukushii
  
• Yami Koso Utsukushii
  ~Galaxia no Iradachi~
  
• Yami Koso Utsukushii
  ~Galaxia no Sakui~
  
• Yatto Aeta ne
  
• Yatto Aeta ne
  (2004 Summer Version)
  
• You're My Jewelry
  
• Yume Yume Utagau Koto Nakare
  
• Yume Miru Mori no Yume no Yume