In 1999, the Association published a collection of works by an outstanding Japanese historian and Russian scholar "Russia as a problem of world history." 20 years later, readers have the opportunity to get acquainted not only with the previous works, but also with the author's new scientific research, which is at the center of the social agenda - the Russo-Japanese War, Karl Marx and revolutionary Russia, the February Revolution of 1917, Lenin and Bukharin. In these seemingly famous plots, Professor Wada finds new twists and aspects of analysis.