The western Pacific Ocean is not literally pacific—it is not peaceful. In the south, overlapping claims to rocky islets have led to clashes over oil and gas reserves and fishery resources between a half dozen countries. In the north, there are also conflicting claims to maritime features. Across the region low-level hostility is not uncommon.
Problems between Japan and South Korea are particularly thorny. Recently, before the current COVID-19 pandemic, tensions mounted, partly reflecting South Korean resentment over Japanese treatment of Korean women during World War II and Japanese reluctance to recognize this issue. Japanese claims to the South Korean administered island of Dokdo (Takeshima in Japanese) are a continuing touchstone inflaming the discussion.