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Field Marshal Yamagata Aritomo (1838–1922). Born to a low-ranking samurai family in the Chōshū domain, he became a central figure in the Meiji Restoration of 1868 and one of Japan's first prime ministers.
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Ōkuma Shigenobu (1838–1922). Born in the domain of Saga, he served as prime minister of Japan and founded Waseda University.
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A report on the visit of Grand Duke Mikhailovich in the January 12, 1916, Yomiuri Shimbun.
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Japanese Ambassador to Russia Motono Ichirō (1862–1918). After 10 years of service in Russia, he was awarded the title of viscount and then appointed as foreign minister.
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Russian Foreign Minister Sergei Sazonov (1860–1927).
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The official text of the agreement between Japan and Russia in the newspaper Tokyo Asahi Shimbun on July 9, 1916.