Russia Planned To Attack Japan in 2021: Leaked FSB Letters Russia was preparing to attack Japan in the summer of 2021, months before President Vladimir Putin launched a full-scale invasion of Ukraine, an email featuring a letter from a whistleblower at Russia's Federal Security Service (FSB), shared with Newsweek, reveals.Kuril Islands A peace treaty formally ending World War II has never been signed by Russia and Japan, largely because of disputes over a group of islands claimed by Japan, but occupied by Russia."The Heavenly Kingdom (China) takes any attempted revisions to the postwar agreements very negatively, and a potential victory for Tokyo in the dispute over the Kurils is unacceptable to Beijing.The whistleblower noted that former Japanese Prime Minister Shinzo Abe was at the time already placing a strong emphasis on both trying to "negotiate" with Russia over the Kuril Islands issue and reforming the country's intelligence service.The FSB whistleblower said that the service was tasked with launching an "information campaign against Japan in Russian society.""