If South Korea and Japan sign a military logistics support agreement, their ties with the US would deepen as they act in concert to deter China and North Korea, analysts said.However, they noted that several “hurdles” must be cleared before the deal could be sealed, including domestic opposition in South Korea to expanding security ties with Japan due to concerns it could sour relations with China, as well as unease stemming from Tokyo’s wartime history.During the Shangri-La Dialogue in Singapore on Sunday, South Korean Defence Minister Ahn Gyu-baek said he had discussed the Acquisition and Cross-Servicing Agreement (Acsa) during a meeting with his Japanese counterpart, Shinjiro Koizumi.“As this is a matter that requires understanding and persuasion from the peoples of both countries, we still believe that we should remain cautious,” Ahn said.The Acsa would simplify the exchange of military supplies – such as ammunition, fuel and food – during emergencies or joint operations between signatory countries.Ahn’s comments were the first time that a senior South Korean defence official has acknowledged that the two sides were discussing the Acsa. In 2012, the countries began talks on the General Security of Military Information Agreement (GSOMIA) and the Acsa, but both were put on ice due to opposition in South Korea.