ヤマハ | YDP-131 - ARIUS(アリウス) - 概要,Yamaha Arius YDP-131 Digital Piano in rosewood finish stock,Yamaha Arius YDP-131 Digital Piano in cherry / light oak,Yamaha Arius YDP-131 Digital Piano and stool in rosewood,YAMAHA YDP-131 / YDP-213 [Electronic Keyboard Models & Demo