This book provides an in-depth study of the Japanese-Soviet neutrality pact, which held between 1941 and 1945 and ended with the USSR's declaration of war against Japan. Slavinsky draws on recently opened Russian archival material to demonstrate that the Soviet Union was passing information about the Allies to Japan during the Second World War. The book contains empirical data not previously available in English.

Boris Slavinsky spent many years researching Soviet foreign and defense policies in service of the British government which led him to later undertake academic research in the subject. He specialized in Russian/Soviet military history and policies towards the Asia Pacific region and was studying the Russian Far East shortly before he died.
Geoffrey Jukes is now retired but was formally an Associate Fellow of the Australian National University.

1. Historiography of the Problem 2. Non-Aggression Pact or Neutrality Pact? 3. Matsuoka's Negotiations in Moscow, Signing and Evaluation of the Neutrality Pact 4. Germany's Attack on the USSR and Japan's Position 5. Japan's Pearl Harbour Attack and the Neutrality Pact 6. The Neutrality Pact during Japan's Period of Success in the East Asian War 1941-42 7. Implementing the Neutrality Pact, 1943 to mid 1944: Problems and Achievements 8. The Last Year of the USSR's War with Germany 9. The Denunciation of the Neutrality Pact 10. Japan Seeks Soviet Mediation, May-July 1945 11. The USSR joins the War against Japan Afterword. Endnotes