Top officials of Japan and China discussed their disagreements over Tokyo’s disposal of treated wastewater from the ruined Fukushima nuclear plant at the Asean leaders’ summit in Jakarta.

Japanese Prime Minister Fumio Kishida and Chinese Premier Li Qiang spoke briefly one-on-one and had a more extended exchange at a forum with Southeast Asian leaders and South Korean President Yoon Suk Yeol on Wednesday, according to statements from Japan’s Ministry of Foreign Affairs.