
Forbidden Zone is the two-hundred and sixth chapter of Sakamoto Days, part of the JAA Jail Arc. Oki lays out his ideology for allying the Order with Slur, a brutal fight erupts, and the store is bombed before two long-absent veterans make a sudden return.
Oki and the Order openly commit to Slur's side. Pressed by Sakamoto on why they would align now, Oki argues that the paid killer's trade is fading: constant surveillance makes concealed hits nearly impossible, pushing prices up and clients away, so people increasingly pursue what he calls social death, ruining lives through information and reputation rather than physical murder. To Oki, Slur is the means to break that manipulative society and restore the assassin's era. Shin and Heisuke privately decide he has lost his mind, since he treats laws and rules as afterthoughts and savagery as the world's true base, with killers at its summit. Sakamoto counters that only a life immersed in violence could produce such a belief. Checking a watch hidden under his sleeve, Oki announces a three-minute job with no overtime, and the four Order fighters ready their weapons.
Osaragi's collapsible buzzsaw sweeps in a wide arc, forcing Sakamoto, Shin, Heisuke, and Hoshi to spring clear. Recognizing her from the gallery encounter, Shin tries to lock her neck, but she overpowers him and slams him into the concrete. Shishiba drives the point of his hammer at Heisuke, who blocks with his rifle; reading Shishiba's thoughts leaves Shin visibly shaken, though Shishiba hushes him with a finger to his lips. Boiled, tiring against Tanabata, takes a guitar to the head that sends him through a wall, then a pick to the chest that draws blood, and Tanabata remarks on the terrible sound before letting him go. Torres leaps from the roof with a sandblast, but Sakamoto flips clear and kicks him back up top.
Sakamoto urges relocating to spare civilians, and Oki flatly reveals that the old rule forbidding harm to bystanders no longer applies under the new federation. He shows a live feed from the store, where a supposed customer steps inside near Aoi and Lu and the shop erupts in an explosion. Sakamoto's mind fractures at the memory of Aoi's smile. As Oki moves to drive a knife into his neck, a blur cuts in: Kindaka, finally awake after an eight-year coma, pulls Sakamoto to safety, while Yotsumura presses his three-section staff blade to Oki's throat. Shishiba grimaces at the pair's survival, and Kindaka mutters that the brats have been running wild.
Oki and the Order formally join forces with Slur, and Oki spells out his belief that surveillance has doomed the assassin profession. A four-on-several brawl breaks out, with Osaragi, Shishiba, Tanabata, and Torres pressing Sakamoto's group. Oki reveals the JAA rule protecting bystanders is now void and triggers the bombing of the store while Aoi and Lu are inside. Kindaka wakes from his coma to rescue Sakamoto, and Yotsumura reappears to hold Oki at blade-point.
Titled Forbidden Zone, this is the two-hundred and sixth chapter of the series within the JAA Jail Arc. It runs nineteen pages and appears in Volume 23. Publication came on March 24, 2025, in the seventeenth issue of that year. The chapter reintroduces both Kindaka and Satoru Yotsumura after long absences.

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Sakamoto Days Chapter 206, titled Forbidden Zone, is part of the JAA Jail Arc and follows Oki laying out his ideology for allying the Order with Slur before a brutal fight erupts.
Oki argues that constant surveillance has made the assassin trade unsustainable, pushing people toward what he calls social death through reputation destruction instead of killing, and he sees Slur as the means to restore the assassin's era.
The Sakamoto family store is bombed in Chapter 206 after a supposed customer steps inside near Aoi and Lu, an attack Oki shows Sakamoto through a live video feed.
Kindaka, who has just woken from an eight-year coma, rescues Sakamoto from Oki's knife attack, while Satoru Yotsumura presses a blade to Oki's throat.
Chapter 206 belongs to the JAA Jail Arc and was published on March 24, 2025, in the seventeenth issue of that year.
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