According to Japan's Kyodo News, sources familiar with the matter revealed that Japan may mention nuclear-powered submarines in a key security document to be revised by the end of the year, listing it as a topic for further research and discussion. Some lawmakers within the ruling coalition hope that Japan will consider acquiring nuclear submarines, but the issue remains sensitive. Sources said that if such submarines are mentioned in the relevant documents, the wording is unlikely to imply that Japan has decided to acquire them.