[3] In 2009, mouse on the keys released their first full-length album titled An Anxious Object on "Machu Picchu Industries".
[11][12] mouse on the keys composed music for the exhibition "TADAO ANDO : ENDEAVORS” at the National Art Center, Tokyo.
The new music written for the installation is entitled The Beginnings / The Prophecy (TADAO ANDO : ENDEAVORS version).
Yuji Katsui (from ROVO) x mouse on the keys released the soundtrack album of NHK Special Drama ''Phone Fraud Children'' on October 2.
The band did the first live concert in three years at Hiratsuka Hall in Japan and they released limited new single CD titled "The Dawn".