Natsuko Yanagimoto Vocal And Marihiko Hara Composition And Piano Started Their Project As "rimacona" In 2004. Rimacona's Work "delta" Including A Recording Of A Lullaby In Kumamoto Was Presented At "intro Out" Festival 2006 In Greece. In Summer Of 2006 Rimacona Organized A Concert As An Opening Event Of "FEU NOS PERES ~Japanese Migrants In New-Caledonia~" By Mutsumi Tsuda At Tjibaou Caltural Center In New-Caledonia. Rimacona Took Part In The Group Exhibition "In Transition" Held In Cyprus In October And Traveled In Yokohama Fukuoka Kyoto And Okinawa In 2007.