Pacific nations are urging Japan to clean up World War II shipwrecks.

Oil leaks from these shipwrecks are putting coral reefs, mangroves, and fisheries at risk.

The Major Projects Foundation conducts fieldwork on sunken vessels in Chuuk Lagoon in the Federated States of Micronesia.

Paul Adams discovered oil leaks from corroding fuel tanks of sunken vessels while scuba diving in Micronesia.

The issue was reported by Sophie Mak, a staff writer for Nikkei.