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."
Japan–Russia relations leaders decided to sign off on joint projects in five areas — aquaculture, greenhouse farming, tourism, wind power and waste reduction. At the 2018 Thirteenth East Asia Summit in Singapore, Shinzo Abe followed up on a proposal from Vladimir Putin to sign a peace treaty without preconditions by the end of the year. He said that the leaders would seek a peace treaty to the terms of the 1956 Soviet–Japanese Joint Declaration. The declaration gave Japan the Habomai islet group and Shikotan while the Soviet Union claimed the remaining islands, but the United States did not allow the 1956 treaty.