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Gen'yōsha

The Dark/Black Ocean Society (Japanese: 玄洋社, Hepburn: Gen'yōsha) was an influential Pan-Asianist group and secret society active in the Empire of Japan.

Foundation as the Koyōsha[edit]

Founded as the Koyōsha by Hiraoka Kotarō (1851–1906), a wealthy ex-samurai and mine-owner, with mining interests in Manchuria, Tōyama Mitsuru, and other former samurai of the Fukuoka Domain, it agitated for a return to the old feudal Japanese order with special privileges and government stipends for the samurai class.[1]:215 The Koyōsha participated in the various ex-samurai uprisings in Kyūshū against the early Meiji government, but after the suppression of the Satsuma Rebellion in 1877, it abandoned its original goals, joined the pro-democracy Freedom and People's Rights Movement, and formed a political organization to agitate for a national parliament instead.

Nationalism[edit]

The primary English-language text on the Gen'yōsha presents the group as ultranationalistic.[2]: 167  Academic Mark W. Driscoll writes that even that text recognizes that the Gen'yōsha did not want Emperor Meiji's power to expand and in 1881 the organization's position was simply that the imperial household should be respected.[2]: 167  Writing in 1935, Yumeno Kyūsaku stated that the early Gen'yōsha were not nationalistic.[2]: 168 


The Gen'yōsha was considered to be an ultranationalist group by General Headquarters in the International Military Tribunal for the Far East.[7]

Legacy[edit]

The Gen'yōsha was the forerunner of a number of organizations which inherited and developed its ideology. It also set the stage for the post-World War II ties between right-wing politicians and yakuza organized crime syndicates.


Although modern yakuza share many of Gen'yōsha's political and social philosophies, and although many of Gen'yōsha's members were drawn from yakuza ranks, the Gen'yōsha was primarily a political organization that often used criminal means to attain its goals, and was not a yakuza itself, as some authors have claimed.[8]

In popular fiction[edit]

Part of its role in Korean history (and its methods for gathering information) is fictionalised in the 2018 South Korean TV series, Mr Sunshine.[9]

Black Dragon Society

Min, Anchee (2003). . Boston: Houghton Mifflin. ISBN 0618531467.

The Last Empress

Gordon, Andrew (2003). A Modern History of Japan: From Tokugawa Times to the Present. Oxford: . ISBN 0195110617.

Oxford University Press

(2012). Die Thule-Gesellschaft und die Kokuryûkai: Geheimgesellschaften im global-historischen Vergleich. Würzburg: Königshausen & Neumann. ISBN 978-3826049095.

Jacob, Frank

Victor, George (2005). The Pearl Harbor Myth, Rethinking the Unthinkable. Lincoln, Nebraska: . ISBN 1597970425.

Potomac Books

Crowdey, George (2006). . Oxford: Osprey Publishing. ISBN 1841769339.

The Enemy Within, A History of Espionage

Media related to Genyosha at Wikimedia Commons