The book by an orientalist professor shows on a documentary basis the policy of militaristic Japan towards the Soviet Union on the eve and during the Second World War. Disclosure of strategic and operational plans, a set of measures to prepare for the war against the USSR in 1931–1945. makes it possible to better understand the nature of the aggressive plans of the Japanese leadership, to reveal the reasons for the failure of the so-called “ripe persimmon” strategy, which provided for a treacherous attack on our country in the event of its defeat in the war against Nazi Germany, and also to refute the falsified version of the supposedly “honest execution by Japan of the Japanese Soviet Neutrality Pact of 1941."