 There were no Dutch shipments from Batavia in 1782 due to the Fourth Anglo-Dutch War and thus the trading post in Dejima was cut off from communication with Java during this year.In this year Titsingh stayed in his position as Opperhoofd and concerned himself with befriending Japanese scholars, deepening relations with Japanese friends and researching on all scopes of Japanese customs and culture.He also achieved, due to the absence of Dutch shipping that year, important trade talks and great concessions with the Japanese on a long-debated increase to copper exports from Japan to the Dutch traders.