 The score for the game was composed primarily by Kumi Tanioka , with Yasuhiro Yamanaka penning three tracks and J @-@ Pop singer Kou Shibasaki writing and performing the theme song titled " Memory Pocket <unk> " . The non @-@ optional event scenes of the game are fully voiced . The Code Age Commanders Original Soundtrack , which does not contain " Memory Pocket " , was published by Square Enix on October 19 , 2005 in Japan . It spans two discs and 80 tracks , covering a duration of 2 hours and 28 minutes . " Memory Pocket " was released as the B @-@ side to Shibasaki 's single Sweet Mom by Universal Music Group on October 5 , 2005 in Japan , and was included in her second album Hitori Asobi published by Universal Music Group on 2006 @-@ 12 @-@ 14 in Japan . 
