Japan is exploring cooperation with Indonesia on the conservation of Citarum River in West Java as part of a number of project agreements between the two countries. This was stated by Minister of Foreign Affairs, Retno Marsudi who accompanied President Joko Widodo to receive the special envoy, Toshihiro Nikai sent by Japanese Prime Minister Toshihiro Nikai, along with his delegation, at the Bogor Presidential Palace on Friday. Environmental cooperation was among the topics discussed during a bilateral meeting, including the exploration of the conservation of Citarum River which still needs a separate formulation. Minister Retno Marsudi noted that the deputy of the Japanese environment minister will visit Citarum River for a preliminary assessment of conservation cooperation. President Joko Widodo has ordered an immediate revitalization of the longest and largest river in West Java, considering its vital role in upholding the livelihood of the people. (Ant)