Katsu Kaishū (1823–1899) was a shogunal retainer who lived from the closing years of the Edo period into Meiji. He was born in 1823 at Honjo Kamezawa-chō in Edo. His house was hatamoto in name, but its standing is said to have been bought with his great-grandfather's money, and it lived near the bottom of Edo's warrior class. He is said to have trained under Shimada Torinosuke and earned his licence in swordsmanship — yet he never cut down a single man in his life. He himself said he tied the hilt of his sword to its scabbard with a cord, so that it could not be drawn.
He taught himself Dutch, and over a year copied out the Dūfu Haruma dictionary twice, selling one copy to pay the loan on the book. In the year the American ships came, a single memorial on coastal defense caught the eye of the senior councillor Abe Masahiro, and an unknown low-ranking retainer stepped onto the stage of history. He spent five years at the Nagasaki naval school, and in 1860 crossed the Pacific aboard the Kanrin Maru. He was, however, neither her captain nor her commander, and seasickness kept him in his cabin for most of the voyage. He was the man who built a navy, not a fine hand at sea.
He opened a naval training center at Kōbe and took in Sakamoto Ryōma, a runaway from his domain, as a pupil. In 1868, when the shogunate had become the side being folded up, Katsu made ready to burn Edo and only then sat down to talks with Saigō Takamori. Yamaoka Tesshū's advance negotiation, the petitions from the inner palace, the pressure of the foreign powers — every card was laid out, and in two days a city of a million was spared the fire. He lived thirty years into Meiji, keeping the old shogunal retainers fed while being accused of bending his principles, working to restore Saigō's honor, and bringing about an audience for his old lord Tokugawa Yoshinobu. Ten months after that, he collapsed on stepping out of the bath and died, aged seventy-five.