Sakamoto Ryōma (坂本龍馬 or 坂本竜馬; 3 January 1836 – 10 December 1867) was a Japanese samurai, a shishi and influential figure of the Bakumatsu, and establishment of the Empire of Japan in the late Edo period.
Sakamoto was a low-ranking samurai from the Tosa Domain on Shikoku and became an active opponent of the Tokugawa Shogunate after the end of Japan's sakoku isolationist policy. Under the alias Saitani Umetarō (才谷梅太郎), he worked against the Bakufu, the government of the Tokugawa shogunate, and was often hunted by their supporters and the Shinsengumi. Sakamoto advocated for democracy, Japanese nationalism, return of power to the Imperial Court, abolition of feudalism, and moderate modernization and industrialization of Japan. Sakamoto successfully negotiated the Satchō Alliance between the powerful rival Chōshū and Satsuma domains and united them against the Bakufu. Sakamoto was assassinated in December 1867 with his companion Nakaoka Shintarō, shortly before the Boshin War and the Meiji Restoration.
Sakamoto Ryōma was born on 3 January 1836 in Kōchi in the han (domain) of Tosa, located in Tosa Province (present-day Kōchi Prefecture) on the island of Shikoku. By the Japanese calendar, Sakamoto was born on the 15th day of the 11th month, of the sixth year of Tenpō. The Sakamoto family held the rank of country samurai or gōshi, the lowest rank in the samurai hierarchy, which previous generations had purchased by acquiring enough wealth as sake brewers. Unlike other Japanese domains, Tosa had a strictly-enforced separation between the joshi (high-ranking samurai) and kashi (low-ranking samurai). The ranks were treated unequally and residential areas were segregated; even in Sakamoto Ryōma's generation (the third in the Sakamoto family), his family's samurai rank remained kashi.
At the age of twelve, Sakamoto was enrolled in a private school, but this was a brief episode in his life as he showed little scholarly inclination. Ryōma's older sister subsequently enrolled him in fencing classes of the Oguri-ryū when he was 14 after he was bullied at school. By the time Sakamoto reached adulthood, he was by all accounts a master swordsman. In 1853, Sakamoto was allowed by his clan to travel to Edo, the seat of the ruling Tokugawa shogunate and the de facto capital of Japan, to train and polish his skills as a swordsman. Sakamoto enrolled as a student at the famous Hokushin Ittō-ryū Hyōhō Chiba-Dōjō, which was led by its first Headmaster Chiba Sadakichi Masamichi at that time. Sakamoto received the scroll from the school that declared his mastery. Sakamoto became a shihan at the Chiba-Dōjō and taught Kenjutsu to the students together with Chiba Jūtarō Kazutane, in whom he found a close friend.
During his time at the Chiba Dojo, Sakamoto met Chiba Sana, Sadakichi's daughter. Within a few years, the two would become very close, with Ryoma requesting permission from Sadakichi to marry Sana. The two would become engaged. In 1858, Ryoma ended his training at the Chiba Dojo, returning to Tosa to further his studies. Despite their engagement, Sana and Ryoma would lose contact for several years.
In 1853, the Perry Expedition began while Sakamoto was studying and teaching in Edo, beginning the Bakumatsu period. Commodore Matthew C. Perry of the United States arrived in Japan with a fleet of ships to forcibly end the centuries-old sakoku policy of national isolationism. In March 1854, Perry pressured the Tokugawa to sign the Convention of Kanagawa, officially ending the sakoku policy but widely perceived in Japan as an "unequal treaty" and a sign of weakness. The prestige and legitimacy of the Shōgun, a de facto military ruler with a nominal appointment from the Emperor of Japan, was severely damaged to the public. The convention was signed by the rōjū Abe Masahiro, acting as regent for the young and sickly Shōgun Tokugawa Iesada, against the will of the Imperial Court in Kyoto, the de jure ruling authority. Anti-Tokugawa forces considered this evidence that the Shōgun could no longer fulfil the Emperor's will, and therefore no longer fit to rule for him. Sakamoto and many of the samurai class supported returning state power directly to the Imperial Court in Kyoto and began agitating for the overthrow of the Tokugawa shogunate.
In 1858, Sakamoto returned to Tosa after completing his studies, and became politically active in the local Sonnō jōi, the anti-Tokugawa movement arose in the aftermath of the Convention of Kanagawa.
In 1862, Sakamoto's friend Takechi Hanpeita (or Takechi Zuizan) organized the Tosa Loyalist Party "Kinnoto", a Sonnō jōi organization of about 2000 samurai (mostly from the lower rank) with the political slogan "Revere the Emperor, Expel the Barbarians" that insisted on the reform of the Tosa government. Yamauchi Toyoshige, the daimyō (lord) of the Tosa Domain, refused to recognize the group. In response, Tosa Kinnoto plotted to assassinate Yamauchi's governor, Yoshida Toyo, who was appointed as a reformer and modernizer. Yoshida was later assassinated by Tosa Kinnoto after Sakamoto had left Tosa. Sakamoto participated in the plot but did not advocate: he believed Tosa Kinnoto should do something for all of Japan, while Takechi demanded a revolution for only the Tosa clan. Sakamoto decided to separate from Takechi and leave Tosa without authorization. In those days, no one in Japan was permitted to leave their clan without permission under the penalty of death, known as dappan. One of Sakamoto's sisters committed suicide because she left without permission. Sakamoto later used the alias "Saitani Umetarō" (才谷 梅太郎) as he worked against the shōgun.
That same year, in 1862, Sakamoto returned to the Chiba Dojo, using it as a safe haven after running away from Tosa. While there, he reunited with Chiba Sana, and it is said that her father Sadakichi encouraged a full show of commitment to Sana from Sakamoto. With nothing else going on, Sakamoto gifted Chiba a sleeve with his family crest on it. Through this gesture, Sakamoto and Chiba were considered a married couple. Chiba would be informed of Sakamoto's death in 1868, when she still held on to the belief that she was his wife, being unaware that Sakamoto had married another woman.
Sakamoto is mentioned under this alias in the diary of Ernest Satow for 30 September 1867: "Mr. Saedani had to be sat up for laughing at the questions put by us, evidently with the object of ridiculing us out of our case, but he got a flea in his lug and shut up making the most diabolical faces."
While a rōnin, Sakamoto decided to assassinate Katsu Kaishū, a high-ranking official in the Tokugawa shogunate and a supporter of both modernization and westernization. However, Katsu Kaishū persuaded Sakamoto of the necessity of a long-term plan to increase Japan's military strength in the face of Western influence which led to the Convention of Kanagawa. Instead of killing Katsu Kaishū, Sakamoto started working as his assistant and protégé.
In 1864, as the Tokugawa shogunate began taking a hard line against dissenters, Sakamoto fled to Kagoshima in Satsuma Domain, which was developing as a major centre for the anti-Tokugawa movement. In 1866, Sakamoto took part in the negotiation process of the secret Satchō Alliance between the Satsuma and Chōshū domains, which historically had been irreconcilable enemies. However, contrary to popular misconception, his position as a "neutral outsider" did not play an important role in the negotiations, as the critical role was in fact played by Komatsu Tatewaki. Sakamoto founded the private navy and trading company Kameyama Shachū in Nagasaki City with the help of the Satsuma, which later became kaientai or Ocean Support Fleet.
Chōshū's subsequent victory over the Tokugawa army in 1866 and the impending collapse of the Tokugawa shogunate made Sakamoto a valuable commodity to his former masters in Tosa, and recalled to Kōchi with honours. The Tosa Domain was anxious to obtain a negotiated settlement between the Shōgun and the Emperor, which would prevent the powerful Satchō Alliance from overthrowing the Tokugawa by force and thus emerging as a new dominant force in ruling Japan. Sakamoto again played a crucial role in the subsequent negotiations that led to the voluntary resignation of the Shogun Tokugawa Yoshinobu in 1867, thus bringing about the Meiji Restoration.