THE DUET

 was a sub-unit of Seifuku Koujo Iinkai. The group was officially formed in 2007, however, the original members, Hashimoto Mika and Mitsui Mafuyu, had been performing as a due for many years beforehand, even releasing an album together, Duet. The group has been inactive since 2010, following the departure of third member, Ose Ami.

Former Members

 * Hashimoto Mika (橋本美香)
 * Mitsuo Mafuyu (松尾真冬) (Original member, left June 2008)
 * Kida Saori (木田沙織) (Joined July 2008, left November 2009. Harajuku Launchers member)
 * Ose Ami (大瀬あみ) (Joined January 2010, left August 2010)

Singles

 * [2007.04.01] Nippon (ニッポン)
 * [2007.05.01] Kayapo (カヤポ) (PANTA & Nakagawa Goro with THE DUET)



Albums

 * [2005.11.01] Duet

Guest Appearances

 * [2007.02.01] Oshogatsu (Nippon)
 * [2007.1201] GAME (GAME, Egao ga Sukitsu!, Koi wa Shunkashuutou)
 * [2010.01.13] Carpenters Forever (カーペンターズトリビュート) (Koi no Sayonara (恋よさようなら))