Kasigi Yabu

Kasigi Yabu, lord of Izu and a powerful retainer in Toranaga’s shifting coalition, treats loyalty as both a duty and a negotiation. He can charge into danger, offer a family sword in submission, or bargain with Toranaga’s enemies when he sees advantage. His trajectory runs from conspicuous battlefield intervention to high command, from a professed refusal of an assassination plot to a secret bargain with Ishido, and finally to exposure and a death sentence. The contradictions are not incidental: Yabu’s struggle to make himself indispensable is also what makes him difficult to trust.

Identity and Political Position

Yabu’s standing rests on his command of Izu and the warriors attached to it. His value to Toranaga is therefore practical as well as political: Izu’s troops can secure roads, guard passes, and reinforce military operations. Toranaga publicly names him a faithful vassal and grants him Izu together with Suruga and Totomi, provinces worth three hundred thousand koku. The gift elevates Yabu, but it also binds his fortunes to the lord who confers it. Later, the possibility of losing all his lands becomes the price of his political choices.

Yabu is attentive to the dangers that accompany that position. After the destruction of Jozen and his men, he is warned that going to Osaka could mean being punished by the Council of Regents, while Ishido is already angry. The warning places him between competing authorities: the council can outlaw him, Ishido can retaliate, and Toranaga can decide whether to protect him. A separate question about when Yabu should be dealt with, and the terse follow-up asking what to do about him, mark him as an unresolved problem even within Toranaga’s calculations. His military usefulness does not settle the question of whether he is safe to keep close.

Ambition and Military Command

Yabu’s ambition is especially clear in his plans for Blackthorne. He imagines making the foreign pilot his subordinate, having him build ships and train men, and using that capacity to influence Toranaga. The plan makes Yabu’s political method plain: he wants not merely to serve within an existing order, but to acquire the means to shape it. His calculation is urgent and conditional; if he cannot manipulate Toranaga, he imagines the opportunity as lost and consoles himself that he might be better prepared in another life.

That appetite for power coexists with military patience. When asked about the men, Yabu counsels patience, a practical restraint that contrasts with the speed of his own later decisions. Toranaga assigns him substantial responsibilities: mobilizing Izu and sending six thousand men to the frontier passes against the threat of Ikawa Jikkyu, commanding the Musket Regiment during a retreat, and placing it in ambush across the Heikawa Road. In a later deployment, Yabu commands the regiment aboard galleys bound for Yedo, while other forces move by road to protect communications and prepare for Toranaga’s formal visit. These orders show the trust placed in his ability to move troops and guard vulnerable routes, even as questions about his loyalty persist.

Toranaga’s public grant of Suruga and Totomi makes that trust visible to the assembled samurai. Yabu is confirmed as overlord of those provinces as well as Izu, a promotion framed as a reward for faithful service. Yet the scene carries a latent danger: a lord whose power depends on a changing political settlement may be most exposed when that settlement breaks down. Yabu’s authority expands, but so does what he stands to lose.

Submission, Bargaining, and Blackthorne

At one point Yabu insists that he will not go to Osaka until Toranaga goes, and says he has ordered all Izu mobilized. Still kneeling, he offers Toranaga his Murasama blade as a token of filial duty, identifying it as the sword that killed Toranaga’s grandfather. The gesture turns submission into a charged political statement: Yabu places a weapon linked to an old family wound in his lord’s hands and presents himself as bound by obligation. It is an act of allegiance, but one made amid a crisis in which allegiance is repeatedly tested.

His dealings with Ishido’s side expose the instability beneath that display. Yabu reports that he was invited to ally secretly with Ishido, help arrange Toranaga’s immediate assassination, and murder Toranaga’s samurai in Izu. He says that he refused, then protests that the brusque delivery of a summons humiliated him. He demands permission to take revenge on the messenger, invoking the shame he says he cannot endure. Toranaga answers that Yabu could have negotiated for a day, weeks, or longer; instead, Yabu has committed himself. Toranaga uses Yabu’s own earlier preference for having everyone choose sides to make the trap explicit. The episode shows how quickly personal affront and political calculation become entangled for Yabu.

Blackthorne remains central to Yabu’s plans even after Toranaga decides to let him go. When Yabu arrives by palanquin to deliver Toranaga’s terms, he tells Blackthorne that he is free to leave or stay, that he will be treated as a samurai and hatamoto within Toranaga’s lands, and that at sea beyond Japan he will again be governed by foreign laws. He also conveys a lifetime right to dock without search at ports under Toranaga’s control and formally hands over two hundred armed retainers. Yabu is the messenger of a transfer of power that frustrates his own ambitions: he had imagined that control of Blackthorne and his ships might make him dominant at sea, threaten Toranaga’s Christian opponents and Jikkyu, and secure Izu. He regards Toranaga’s release of Blackthorne as a waste of a strategic opportunity.

The relationship between the two men also turns on immediate danger. When ronin attack Yabu at the wharf, he rushes them with his sword drawn and is overwhelmed by their numbers. Blackthorne intervenes and saves his life. Later, once they are well out to sea, Yabu reminds Blackthorne of that rescue and acknowledges the debt. His gratitude is real, but it does not erase his habitual effort to calculate what Blackthorne might do for him. Concern is visible too when Yabu enters the room after the attack on Mariko and relaxes on seeing that Blackthorne is still alive.

The Bargain with Ishido

Yabu’s public service and private maneuvering finally converge in an explicit betrayal. He curses Mariko for forcing him onto Ishido’s side and recognizes the risk of the course he has taken, but says he has no alternative. A condition of his bargain is to open a secret door. He kills Captain Sumiyori without warning, using a short sword and silencing him with his hand; afterward, Yabu arranges the body as if the captain were sleeping and cleans his weapon. The killing is not presented as a planned contest of honor. Sumiyori’s intuition has forced Yabu’s hand, and Yabu is angry that the killing has become necessary, while still deciding that he cannot leave the captain prowling about.

Yabu then forces the small, heavily barred iron door in the wall. When it swings open, a spear thrusts toward his throat and stops; ninja wait in the darkness beyond. The moment makes the bargain physical: Yabu has not merely shifted his sympathies in private but has opened a route for armed intruders. His role in the attack is compromised by his claim that circumstances left him no choice, yet the bargain still requires his deliberate action. The contrast with his earlier assertion that he rejected Ishido’s assassination offer sharpens the uncertainty surrounding his loyalties. He can refuse a proposed crime when it seems disadvantageous, then accept another conspiracy when he believes the alternatives have closed.

His calculations are not limited to immediate survival. While speaking with Yuriko, Yabu imagines the force that Blackthorne’s ships could give him: with a fleet, he believes he might control the seas, damage several opponents, defeat Jikkyu, and keep Izu. The fantasy reveals both strategic intelligence and political isolation. He sees each alliance and military asset as a route to preserving his own domain, but that same self-protective logic leaves him vulnerable to the suspicion that every commitment is temporary.

Exposure and Ending

After the conspiracy and ninja attack, Yabu returns to Toranaga’s side. Toranaga welcomes him back before turning to the regiment, but the greeting does not amount to forgiveness. He asks why Yabu killed Sumiyori before the attack. The question narrows the crisis to a concrete act: whatever coercion or political pressure Yabu invokes, the captain’s death connects him directly to the events Toranaga is judging.

Toranaga declares Yabu’s lands forfeit and orders him to slit his belly before noon. Yabu’s response is neither a defense of his choices nor a claim that he has been misunderstood. He exclaims that he was so close to success, rages against his misfortune, and calls it karma. Even as he curses the gods, he says he will die happy because Jikkyu is dead; in the afterlife, he expects to be able to spit in his enemy’s eye. The ending preserves Yabu’s mixture of defeat and defiance. His political scheme has failed, his lands are lost, and his lord has condemned him, but he takes satisfaction in the vengeance he believes he has secured.

Yabu’s arc is shaped by reversals in which service and self-interest remain difficult to separate. He can mobilize troops for Toranaga, offer the sword associated with Toranaga’s grandfather, and risk his life in a fight; he can also seek to control Blackthorne’s ships and open a secret door for Ishido’s plan. His final cry of near-success makes the gap between ambition and loyalty explicit. Yabu wants power enough to serve it, bargain for it, and betray for it, but the shifting alliances he treats as instruments ultimately leave him answerable to the very lord whose confidence he could never securely possess.