Toranaga’s secret proposal to his half-brother Zataki was a bid to turn a dangerous northern barrier into a route for war against Ishido. Through their mother, he offered a marriage with Lady Ochiba, extensive Christian domains, and a future joint campaign in return for an alliance and safe passage through the Shinano Mountains. The offer was both a military plan and a contest over succession: it invoked loyalty to the late Taikō and the security of Yaemon’s inheritance, while positioning Toranaga to recover authority over the Council of Regents.

Causes and Political Stakes

Before drafting the offer, Toranaga had to recover his composure. Aches in his chest left him weak and dizzy; he sat down, breathed slowly as Zen teachers had taught him, and directed his mind toward the Void. Once his thoughts cleared, he went to his desk and made his mother the intermediary between himself and Zataki. The care with which he proceeded reflects the risk of approaching a brother whose intentions he could not fully know: even the secrets reaching him might, he considered, be false and planted by an enemy.

The offer addressed two linked problems. Toranaga needed a way through Shinano, which lay across his only road, and he needed allies against Ishido as the prospect of a final battle approached. He also framed the conflict as a struggle over the Taikō’s succession and the peace of the realm, not simply a personal contest for power. In his proposal, he described Kiyama and Onoshi as Christian traitors plotting with foreign priests and alleged that Ishido intended, after Toranaga’s death, to dissolve the Council and marry the Heir’s mother. Those were claims made in Toranaga’s appeal, not independently established facts; their political function was to make an alliance with him appear to serve both the succession and the realm.

Terms of the Proposal

Toranaga asked Zataki to consider marrying Lady Ochiba. He presented the match as a public guarantee of peace and of Yaemon’s succession, arguing that Zataki’s loyalty would not be doubted as Toranaga’s was. He proposed that, after the supposed traitors had been removed and he had resumed his place as President of the Council of Regents, he would invite the Son of Heaven to request the marriage. The arrangement therefore joined private kinship to imperial endorsement and the political restoration Toranaga expected to achieve.

The territorial inducements were substantial. Toranaga offered Zataki the domains of Kiyama and Onoshi, whom he accused of conspiring against non-Christian daimyō, as well as the lands of other Kyushu Christians who might side with Ishido in the coming battle. These promises made the proposed alliance more than a military compact: they offered Zataki a share in the redistribution of power that Toranaga anticipated if his enemies were defeated. The promised lands also depended on victory, binding the reward to participation in the conflict.

In return, Toranaga requested a secret treaty, safe passage for his armies through the Shinano Mountains, and a joint attack on Ishido under Toranaga’s command, at a time and in a manner of his choosing. The terms gave Zataki a consequential role but reserved strategic initiative for Toranaga. He described one further commitment as a measure of trust: he would send Sudara, Lady Genjiko, and their children—including his only grandson—to Zataki at Takato. The family’s journey was to begin within ten days of the agreement’s confirmation.

Dispatch and Confirmation

After sealing the proposal, Toranaga recognized that its terms did not resemble those of a man who had accepted defeat. He also understood that Zataki would recognize this immediately. Yet the offer itself was part of the trap he was setting: Shinano obstructed Toranaga’s route, and Zataki was a key to reaching the Osaka plains. Toranaga’s private uncertainty about whether Zataki truly wanted Lady Ochiba, and whether the rumor behind that possibility was reliable, did not stop him from using the possibility as the basis of a calculated proposal.

Toranaga then wrote a separate message for a carrier pigeon. He selected a pigeon from Takato, fitted the tiny cylinder containing the message, and placed the bird in an open box in the loft so it could fly at first light. The message asked his mother to request safe passage for Buntaro, who carried an important dispatch for her and Zataki. Toranaga signed it with the name Yoshi Toranaga-noh-Minowara, claiming that mantle for the first time. The signature gave the communication a significance beyond its practical request: it marked an explicit assertion of identity at the moment he sought to reshape the balance of power.

Two hours after dawn, a reply from his mother arrived: Zataki agreed, and his letter of confirmation would be sent by hand that day. She added that Sudara and his family were to begin their state visit within ten days. Toranaga sat down weakly before gathering himself and going to his quarters to begin the next steps. The response confirmed the alliance’s essential terms, but it also set its consequences in motion: a family transfer, passage through Shinano, and the possibility of a coordinated campaign against Ishido.

Significance

The proposal exposes the difference between Toranaga’s outward position and his actual strategy. He could contemplate a marriage alliance, the transfer of his own son and grandson, and the partition of enemy domains while recognizing that every promise carried political danger. His offer treated family, territory, military access, and imperial legitimacy as parts of a single negotiation, each serving a distinct purpose in securing the next.

Its form matters as well. Rather than approach Zataki openly, Toranaga used his mother as intermediary, sealed a carefully constructed offer, and relied on a carrier pigeon to coordinate a separate request. The resulting agreement did not itself defeat Ishido, but it changed the strategic conditions under which Toranaga could confront him. Shinano, previously the obstacle across his only road, could become the route for his armies; a brother whose intentions Toranaga questioned could become an ally; and the act of sending his family to Takato could serve as a declared measure of trust. Zataki’s reply makes the proposal a turning point from concealed possibility to an alliance with immediate obligations.