Note: No single documented event has been confirmed as occurring specifically on July 12, 1853. This entry covers the active deliberation period following Perry's letter delivery on July 14 — the days when 老中首座 (Rōjū-shuza) Abe Masahiro was grappling with the central crisis of his career and making the fateful decision to poll the daimyo.

Perry's ships were gone — had sailed away on approximately July 17, promising to return with more of them. Now Edo Castle was quiet in a way that felt nothing like peace. 老中 (Rōjū) Abe Masahiro had to decide what Japan would say when the Americans came back.

He was 33 years old. He had become a 老中 (rōjū) — a senior councilor of the shogunate — at age 25 and had risen to 老中首座 (rōjū-shuza), the presiding councilor, by 26. In 1846, American ships under Commodore James Biddle had appeared in Edo Bay demanding trade. Abe had turned them away without concession, without crisis. He had watched that success and believed the closed-country policy could continue to hold. Then Perry arrived with Paixhans shell guns and a letter addressed to the 将軍 (Shōgun) himself, and the old policy became untenable in a single afternoon.

The 将軍 (Shōgun) Tokugawa Iesada was ill and largely incapable of leadership. The decision was Abe's alone. He had three options: refuse the American demands and risk attack on Edo, accept them and shatter 250 years of isolation policy, or find some way to stall and buy time. He chose the last — but the method he used to buy time would prove more destabilizing than capitulation might have been.

Abe copied Perry's letter and Fillmore's demands and distributed them to every daimyo in Japan — approximately 270 lords, including the powerful 外様大名 (tozama daimyō), the 'outside lords' whose clans had been excluded from political power since the Battle of 関ヶ原 (Sekigahara) in 1600. He asked for their written opinions. He was trying to share responsibility for an impossible decision, to build a consensus broad enough to survive whatever choice was made.

Of 61 recorded responses, 19 daimyo favored accepting the American demands. Exactly 19 opposed them outright. The remaining 23 hedged in various directions. The poll had not produced a consensus. It had produced a map of exactly how divided Japan was — and that map was now in the hands of every powerful lord in the country.

The damage was structural. For 250 years the 徳川 (Tokugawa) shogunate had governed on the unspoken premise that it knew what to do. That mystique of competence — unverifiable but essential — was the real source of its authority. By asking, by distributing the question to 270 recipients, Abe had proven in writing that the shogunate was uncertain. The daimyo who received those copies did not forget. Among the respondents was Tokugawa Nariaki of Mito, a fiercely anti-foreign loyalist who argued for outright resistance. His faction — 尊王攘夷 (sonnō jōi), revere the emperor, expel the barbarians — would become the ideological engine of the movement that destroyed the shogunate.

Abe Masahiro died on August 6, 1857, at the age of 37. He had spent four years managing the consequences of this decision. He never saw whether his gamble paid off. The Convention of Kanagawa was signed in 1854. The Harris Treaty opened Japan further in 1858. His successor Ii Naosuke tried to reverse the political openness of the poll by simply imposing decisions without consultation — and was assassinated at the 桜田門 (Sakuradamon) in 1860. The 幕末 (Bakumatsu) unraveling accelerated through the 1860s and ended with the Meiji Restoration in 1868.

Every calculation Abe made was reasonable. Every outcome was catastrophic.