The book of the historian-ethnographer, doctor of historical sciences, professor A. B. Spevakovsky is devoted to the topic of military history and military organization of Japan throughout the entire period of the country's existence. The author has been living in Japan for about 30 years, works at a university on the island of Hokkaido and knows this country very well. The work broadly covers the military events of ancient, medieval and new Japan, their consequences, as well as issues of modern wars related to the history of Japanese militarism of the 20th century: wars in East Asia, the country's participation in World War II, including the war against the Soviet Union and the United States. The book is written in popular language and is intended for a wide range of readers.