• 121 Books

• 41 Politics and government
• 40 History
• 13 Saigō, Takamori, 1828-1877
• 8 Katsu, Kaishū, 1823-1899
• 7 Shōtoku Taishi, 574?-622?
• 6 Foreign relations
• 6 Prime ministers
• 5 Kido, Takayoshi, 1833-1877
• 5 Sakamoto, Ryōma, 1836-1867
• 4 Arai, Hakuseki, 1657-1725
• 3 Confucianists
• 3 Correspondence
• 3 Historians
• 3 Itō, Hirobumi, 1841-1909
• 3 Iwakura, Tomomi, 1825-1883
• 3 Ōkubo, Toshimichi, 1830-1878
• 3 Ōkuma, Shigenobu, 1838-1922
• 2 Arai family
• 2 Arai, Ryōichirō, 1855-1939
• 2 Cabinet officers
• 2 Description and travel
• 2 Fujiwara, Michinaga, 966-1027
• 2 Generals
• 2 Hirota, Kōki, 1878-1948

• 8 Nihon Shiseki Kyōkai
• 5 Nihon Rekishi Gakkai
• 4 Rekishi jinbutsu shirīzu
• 4 Tōkyō Daigaku. Shiryō Hensanjo
• 3 Katsu, Kaishū, 1823-1899
• 3 Kido, Takayoshi, 1833-1877
• 3 Yamaji, Aizan, 1865-1917
• 3 Ōbunsha
• 2 Chang, Richard T
• 2 Ienaga, Saburō, 1913-2002
• 2 Oka, Yoshitake, 1902-1990
• 2 Reischauer, Haru Matsukata, 1915-1998
• 2 Saigō, Takamori, 1828-1877
• 2 Sakamoto, Tarō, 1901-1987
• 2 Shimada, Saburō, 1852-1923
• 2 Shinba, Eiji, 1912-1999
• 2 Tsumaki, Chūta, 1870-1944
• 2 Yumani Shobō
• 2 Ōkubo, Toshimichi, 1830-1878
• 1 '95 Kashima Shinpojūmu "Fujiwara no Kamatari to Sono Jidai" (1995 : (Kashima-machi, Ibaraki-ken, Japan)
• 1 Andō, Yūichirō, 1965-
• 1 Anesaki, Masaharu, 1873-1949
• 1 Aoki, Kazuo, 1926-2009
• 1 Arai, Hakuseki, 1657-1725
• 1 Borgen, Robert, 1945-

• 98 Japanese
• 22 English
• 5 Chinese

• 3 China
• 2 United States
• 1 Chōshū-han (Japan)
• 1 Hokkaido

• 96 Biography
• 10 Diaries
• 9 Correspondence
• 8 Sources
• 1 Archives
• 1 Bibliography
• 1 Biographies
• 1 Catalogs
• 1 Commentaries
• 1 Congresses
• 1 Dictionaries
• 1 Facsimiles
• 1 Juvenile fiction

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