A business delegation from northeastern China has visited a Russian-controlled, Japanese-claimed island off Hokkaido to explore joint economic projects, prompting protests from Tokyo. Officials and business leaders from Heilongjiang province, which borders Russia’s far east, travelled to Etorofu – known to Russians as Iturup – to survey potential investment opportunities, according to the Sakhalin Oblast government, which oversees the island. Etorofu is the largest island in a disputed...