The Blade of the Courtesans

The grueling, century-long battle royal that plunged feudal Japan into "an Era of the Warring States" has finally ended, and the victorious Tokugawa clan rules the freshly united Land of the Rising Sun. The shogun will come from the Tokugawa line for more than two hundred years, right until Commodore Perry's "black ships" force the far eastern archipelago into modernity. While the Mikado or emperor retains prestige, he is but a figurehead. It is the beginning of the Edo period.
Yet, despite the onset of peace and prosperity, trouble brews in Yoshiwara, the pleasure quarters of Edo where geisha courtesans count among their clientele numerous bored samurai who are no longer called upon to fight. The issuance of a gomenjo or permit for the red-light district is threatening to occasion a momentous power struggle. The courtesans themselves have no blade of their own - not until an unspoiled young swordsman from the mountains of Higo province arrives in Edo.
Raised by the late legendary Miyamoto Musashi and mysteriously sent to the capital by him, the innocent but lethal Matsunaga Seiichiro bears a secret that is hidden even from himself: he is of the imperial family. Having barely survived a ruthless purge by Tokugawa minions as an infant thanks to Musashi, the youth is now more than ready to stand his own against forces that stubbornly seek his death. But the infamous Yagyu clan that serves the shogun includes ninja as well as daylight warriors among its ranks.
Filled with satisfying action, memorable characters, and a genuine aroma of history, The Blade of the Courtesans is a milestone of entertainment fiction, a perennial favorite among younger and older readers alike in Japan for its accessible and layered exploration of bygone yet unforgotten times.

Keiichiro Ryu made his name as an author of historical fiction in a career that lasted only fivers, until his untimely death, Though coming late into the publishing scene, he was no novice to the subject of his life's work, which centered around the Edo Period of Japan (roughly 1600-1868). The Blade of the Couresans was his debut work, set in Yoshiwqara (the pleasure quarters) of old Tokyo.

Ryu graduated from Tokyo University with a degree in Buddhist literature and went on to become an assistant professor at Chuo University. During the Second World War he fought in China as an army cadet. Upon returning he filled an editiorial position at Tokyo Sogen Publishing.

Under the alias Ichiro Ikeda, Ryu wrote several screenplays, and when he made his fiction debut with The Blade of the Courtesans, he was nominated for a Naoki Prize, the Japanese equivalent of the Pulitzer Prize.