Yabu and Blackthorne Join Forces to Seize the Black Ship

Yabu and Blackthorne join forces around a proposed seizure of the Black Ship, transforming an uneasy history of rescue, resentment, and mistrust into a practical military bargain. Blackthorne wants ships and command; Yabu offers the men and fighting power needed to take the Portuguese vessel. Their agreement makes the sea a direct instrument of Toranaga’s political struggle, while leaving clear that the capture is a plan, not an accomplished victory.

Naval Knowledge and the Stakes

The proposal grows from Blackthorne’s conviction that ships and navigational knowledge can alter the balance of power. As a young apprentice to Alban Caradoc, he learned that a rutter was more than a chart: it gathered a pilot’s observations of compass courses, depths, water color and seabed, winds, currents, storms, safe anchorages, places to take on water, and hazards such as reefs and shoals. Such accumulated knowledge could make a voyage safer, but it could not make it certain. Charts were often too vague to be useful, and there was no way to determine longitude reliably; a rutter could also contain copying errors or deliberate falsehoods.

That knowledge was strategically guarded. Portugal and Spain treated routes to the New World, through the Strait of Magellan and around the Cape of Good Hope, and onward to Asia as national secrets. The prospect of gaining ships and experienced seamen therefore meant access not just to a vessel but to maritime capability that other powers sought to monopolize. Blackthorne’s ambition to captain new ships belongs to this larger contest over who could move safely and quickly across unfamiliar waters.

The difficulty of that contest is visible in the earlier escape by galley. Rodrigues chose an open-water course from the southern cape of the Izu Peninsula toward Cape Shinto rather than lose time hugging the coast. He explained that Japanese sailors were accomplished coastal navigators and fighters, but were frightened of deep water; the Taikō had even required Portuguese pilots aboard the few Japanese ocean-going ships. Blackthorne’s later proposal depends on that divide between coastal strength and ocean-going expertise—and on the possibility of bringing ships, pilots, and Japanese force together.

The Partnership Takes Shape

The agreement is made at sea, after the galley and the other ship have worked their way into the harbor stream. Yabu takes Blackthorne aside only once they are well offshore and reminds him that Blackthorne saved his life the previous day by calling off the ronin. He also invokes an earlier encounter with a seaman at Anjiro. Their history is therefore not treated as a clean slate: Yabu names the debt and the past before asking to begin again.

Yabu proposes that, as samurai and hatamoto, they set aside what came before. Blackthorne accepts. The request matters because the alliance does not arise from affection or a sudden disappearance of hostility; it is a deliberate arrangement between men who recognize that they need one another. Yabu says that without him Blackthorne cannot obtain the men he needs, especially from Nagasaki. He offers to help gather them and declares that they now serve the same side, Toranaga’s.

The bargain also turns on a shared objective. Yabu tells Blackthorne that he wants the foreigner to remain and command the new ships. He promises to persuade Toranaga to support the plan and offers to lead the assault on the Black Ship himself. Blackthorne would lead the ship; Yabu would lead the fighting. Their proposed division of labor gives each man a distinct role and makes their cooperation more than a general pledge of loyalty.

Forces, Command, and the Black Ship

Blackthorne asks whether Yabu can provide more than the two hundred men already granted to him. Yabu answers that he can provide two thousand, or even five thousand, if required. The contrast between Blackthorne’s initial number and Yabu’s much larger offer makes the scale of the proposed operation plain: Blackthorne brings the maritime objective and command of the ships, while Yabu claims the capacity to assemble a substantial land force.

The exchange ends in agreement on a fair trade. Yabu believes the partnership will benefit them both, even though he knows Blackthorne hates him. He attributes the soundness of his approach to Yuriko, whose reasoning he had followed. That detail places the alliance within a wider web of counsel and calculation: the men’s spoken agreement is enabled by advice from outside the conversation, not simply by their immediate exchange.

Blackthorne’s confidence as a commander has already been tested under pressure. During the escape from Osaka, he had to judge the galley’s maneuverability against the Santa Theresa’s greater speed. The frigate had to tack toward the harbor mouth in the restricted water near the cliffs, while the galley could turn more freely; Blackthorne estimated its next tack and ordered his crew to hold their course even as the larger ship rapidly overtook them. In another moment of danger, he had recognized the precautions of a frigate lying offshore: its guns, small arms, ammunition, and armed lookouts were prepared against attack. These earlier encounters show why his claim to lead ships rests on practical judgment, not merely on ambition.

Political Timing and Significance

Yabu has already prepared the political and logistical ground for his next move. Earlier that evening, he asked Toranaga for permission to go to Osaka at once and prepare for Toranaga’s arrival, presenting the need to perfect ceremonial arrangements as a reason that could delay the journey for weeks. He also proposed moving Blackthorne’s ship to Yokohama in case of a typhoon, with the Musket Regiment assigned to guard it, before Yabu continued to Osaka by galley. His plan thus joins the immediate problem of securing a ship to the larger task of positioning himself near the political center.

The alliance sharpens the contrast between formal service and private advantage. Yabu declares that they are on Toranaga’s side, yet the proposal also advances Blackthorne’s wish to build a fleet and Yabu’s own standing as the man able to provide soldiers and lead an assault. The arrangement is useful precisely because their aims overlap without becoming identical. For Blackthorne, the Black Ship is the first prize in a future naval project; for Yabu, cooperation offers access to that project and a chance to act as its military partner.

The episode therefore establishes a coalition of skills rather than a settled friendship: Blackthorne’s navigational knowledge and command, Yabu’s access to men and combat leadership, and Toranaga’s authority as the power both seek to serve. Their agreement changes what each can plausibly attempt, but the supplied action stops at the promise and the proposed operation. The Black Ship has not yet been captured; the force of the scene lies in the moment when distrust becomes a workable plan.