He wrote the plan on a boat. Somewhere off the coast of Nagasaki in 1867, a lower-ranked samurai from a merchant family that had purchased its samurai status sat down and drafted the document that would end 265 years of Tokugawa rule. No army behind him. No domain rank worth mentioning. Just Sakamoto Ryōma (坂本龍馬), thirty-one years old, a man who had somehow talked himself into rooms where history was being made.

Ryōma was not supposed to matter. He came from a gōshi family — low-ranking rural samurai — in Tosa domain on Shikoku. His family had bought their samurai status from merchant wealth, which made him, in the eyes of the rigid Edo-period hierarchy, barely samurai at all. He had deserted from his domain without permission, become a ronin, and attached himself to the radical anti-shogunate networks criss-crossing Japan. He had no official authority whatsoever. He also had clearer vision than almost anyone.

The 船中八策 (Senchū Hassaku) — "Eight Proposals While Shipboard" — was staggering in its scope for 1867 Japan. Ryōma was not calling for the shogunate to be destroyed in battle. He was calling for it to peacefully dissolve. His eight points included: return governing authority to the Emperor; establish a bicameral parliament; promote talented men regardless of birth; revise Japan's unequal treaties with foreign powers; establish a national constitution; build an imperial navy; form an imperial guard; regulate gold and silver exchange with foreign nations. Every major institution of the Meiji era — parliament, conscript military, diplomatic treaty revision — was outlined on that boat.

Ryōma passed the plan to Gotō Shōjirō (後藤象二郎), a senior official of Tosa domain with the access and standing Ryōma lacked. Gotō transformed the proposals into a formal petition from the Tosa domain lord to the shogun. The petition asked Yoshinobu to step down before the guns of Satsuma and Chōshū made the question moot.

The last shogun read it. Tokugawa Yoshinobu (徳川慶喜) had turned thirty the day before — on October 28, 1837, he had been born as the son of Tokugawa Nariaki of Mito domain. He had ascended to the shogunate in January 1867, making him both the youngest shogun of his era and the one who had held the position the shortest time. And now, barely ten months into his tenure, he called forty daimyo to Nijō Castle in Kyoto.

Nijō Castle was the perfect place for what came next. Tokugawa Ieyasu had built it in the early 1600s as a statement of shogunal dominance over the imperial court — a fortified palace planted in the Emperor's city to ensure everyone understood who actually governed Japan. Two and a half centuries later, in that same hall, Yoshinobu announced that he was returning governing authority to the Emperor. The 大政奉還 (Taisei Hōkan) — "Return of the Great Governance" — was accepted on October 14 of the Japanese lunar calendar (November 9 by the Gregorian reckoning). The shogunate that Ieyasu had built in Nijō Castle was surrendered in Nijō Castle.

The bitter irony was swift. Satsuma and Chōshū had been preparing for war precisely because they did not trust the shogunate to step down peacefully. They went to war anyway — the Boshin War erupted in January 1868, not because Yoshinobu refused to go but because the imperial faction wanted punishment, not just transfer. Ryōma's peaceful revolution was implemented, and then immediately followed by the war it was designed to prevent.

Ryōma did not live to see any of it. On December 10, 1867 — six weeks after the abdication announcement, by the traditional lunar calendar on the very date of his birth — he was cut down at the Ōmiya Inn (近江屋, Ōmi-ya) in Kyoto. He was thirty-one years old. His assassins fled. The Mimawarigumi (見廻組), a pro-shogunate police unit, confessed to the killing three years later, though the true identity of the man who struck the fatal blow has never been conclusively proven.

Tokugawa Yoshinobu, the man whose dynasty Ryōma had peacefully dismantled, outlived the samurai age entirely. He died in 1913 at the age of seventy-six — the last shogun, a retired gentleman who spent his final decades painting, cycling, and taking photographs of the modern Japan his surrender had helped create.