Ōkuma Shigenobu in the context of "Twenty-One Demands"

The Meiji oligarchy was the new ruling class of Meiji period Japan. In Japanese, the Meiji oligarchy is called the domain clique (藩閥, hambatsu).

The members of this class were adherents of kokugaku and believed they were the creators of a new order as grand as that established by Japan's original founders. Two of the major figures of this group were Ōkubo Toshimichi (1832–78), son of a Satsuma retainer, and Satsuma samurai Saigō Takamori (1827–77), who had joined forces with Chōshū, Tosa, and Hizen to overthrow the Tokugawa shogunate. Okubo became minister of finance and Saigō a field marshal; both were imperial councillors. Kido Koin (1833–77), a native of Chōshū, student of Yoshida Shōin, and conspirator with Ōkubo and Saigō, became minister of education and chairman of the Governors' Conference and pushed for constitutional government. Also prominent were Iwakura Tomomi (1825–83), a Kyoto native who had opposed the Tokugawa and was to become the first ambassador to the United States, and Ōkuma Shigenobu (1838–1922), of Hizen, a student of Rangaku, Chinese, and English, who held various ministerial portfolios, eventually becoming prime minister in 1898.

Japan participated in World War I from 1914 to 1918 as a member of the Allies/Entente and played an important role against the Imperial German Navy. Politically, the Japanese Empire seized the opportunity to expand its sphere of influence in China, and to gain recognition as a great power in postwar geopolitics.

Japan's military, taking advantage of the great distances and Imperial Germany's preoccupation with the war in Europe, seized German possessions in the Pacific and East Asia, but there was no large-scale mobilization of the economy. Foreign Minister Katō Takaaki and Prime Minister Ōkuma Shigenobu wanted to use the opportunity to expand Japanese influence in China. They enlisted Sun Yat-sen (1866–1925), then in exile in Japan, but they had little success. The Imperial Japanese Navy, a nearly autonomous bureaucratic institution, made its own decision to undertake expansion in the Pacific area. It captured Germany's Micronesian territories north of the equator, and ruled the islands until they were transitioned to civilian control in 1921. The operation gave the Navy a rationale for enlarging its budget to double the Army budget and expanding the fleet. The Navy then gained significant political influence over national and international affairs.

Waseda University (Japanese: 早稲田大学), abbreviated as Waseda (早稲田) or Sōdai (早大), is a private research university in Shinjuku, Tokyo. Founded in 1882 as the Tōkyō Professional School [ja] by Ōkuma Shigenobu, the eighth and eleventh prime minister of Japan, the school was formally renamed Waseda University in 1902.

Waseda is organized into 36 departments: 13 undergraduate schools and 23 graduate schools. As of 2023, there are 38,776 undergraduate students and 8,490 graduate students. In addition to a central campus in Shinjuku (Waseda Campus and Nishiwaseda Campus), the university operates campuses in Chūō, Nishitōkyō, Tokorozawa, Honjō, and Kitakyūshū. Waseda also operates 21 research institutes at its main Shinjuku campus.