Japan–South Korea relations South Korea share military information about North Korea without the US. In 2017, South Korean Foreign Minister stated that South Korea would not enter any trilateral military alliance with the United States and Japan, something that Chinese President Xi Jinping raised concerns about when he met South Korean President Moon Jae-in. South Korea has been wary of Japan’s ambitions, under its prime minister Shinzo Abe, to increase its military profile in the region. Moon stated that "If Japan uses a nuclear-armed North Korea as an excuse for its military expansion, it would not be appropriate for ASEAN nations as well."
China–Japan relations forces in part due to the First and Second Opium Wars and Anglo-French Expeditions from the 1860s to the 1880s. According to Chinese government, the relationship between China and Japan has been strained at times by Japan's refusal to acknowledge its wartime past to the satisfaction of China. However, according to Japanese government, the expansion of People's Liberation Army and its assertive actions have been damaging the bilateral relation. Revisionist comments made by prominent Japanese officials and some Japanese history textbooks regarding the 1937 Nanking Massacre have been a focus of particular controversy. Sino-Japanese relations warmed considerably after Shinzo Abe