Trade between the Koreas ` ` serves the common interest of all parties , '' an official says . Yoshihiko Noda visits Beijing for the first time as Japanese prime minister . China and Japan also signed energy and environmental agreements . Both countries will also use their own currency -- not the U.S. dollar -- in bilateral trade .
Peace between the Koreas `` serves the common interests of all parties , '' an official says . Yoshihiko Noda visits Beijing for the first time as Japanese prime minister . China and Japan also signed energy and environmental agreements . Both countries will also use their own currencies -- not the U.S. dollar -- in bilateral trade .