MOSCOW, Aug 11 (Reuters) - Russia and Japan"s foreign ministers discussed plans for joint economic activity on the Russian-held southern Kuril islands that Japans lays claim to, Russia"s foreign ministry said in a statement on Wednesday. Russian Prime Minister Mikhail Mishustin in July said Moscow planned to set up a special economic zone with no customs duties and a reduced set of taxes on the island chain, during a visit to the islands that elicited a diplomatic protest from Tokyo. read more