Every episode of Black Torch drops the phrase Bureau of Espionage like it’s just another government office. But the show is quietly borrowing from a real Edo-period spy network, and once you know the history, Jiro’s ninja bloodline hits different.
With Black Torch now airing its anime adaptation, fans have started digging into where the Oniwabanshu actually comes from. Turns out it’s not a manga invention at all. It’s a genuine 18th-century intelligence agency that answered directly to the shogun, and its real story is almost as strange as the mononoke Jiro fights.
What Was the Real Oniwabanshu?
The Oniwabanshu was founded by Tokugawa Yoshimune, the eighth shogun, after he took power in 1716. Yoshimune came from the Kii domain, and when he moved to Edo Castle he brought along a small group of loyal men from his home territory to serve as his personal intelligence network. Some accounts describe them as gunpowder handlers repurposed for secret work, others as an elite cadre of roughly twenty handpicked agents.
Their job wasn’t quite the flashy assassin work you’d expect from ninja fiction. The Oniwabanshu mostly gathered intelligence on daimyo and shogunate officials Yoshimune suspected of disloyalty, reported on happenings around Edo, and inspected the state of the countryside while posing as ordinary travelers. They also pulled castle security duty and answered only to the shogun himself, which gave a relatively low-ranking group an outsized amount of influence.
Popular culture is actually responsible for a lot of the ninja mythology attached to them. Historians note that the Oniwabanshu were dramatized as flashy shinobi in Edo-era plays and novels, a trend that stuck around long enough to shape how modern anime and manga picture them. The agents were also kept under strict rules, barred from socializing freely with outsiders and, according to some records, only permitted to marry within their own profession to protect the secrecy of the group.
From Shogunate Spies to Bureau of Espionage
Black Torch takes that real foundation and bends it into something much stranger. In the manga’s backstory, the mononoke Amagi tried recruiting allies during the Edo period to resist the newly formed Oniwabanshu, but Jiro’s own mononoke partner Rago refused to join him. That single flashback folds actual Tokugawa-era history directly into the show’s supernatural war.
By the present day, the organization has rebranded as the Bureau of Espionage, and the old Oniwabanshu clans have become hereditary lines like Ichika’s Kishimojin family and Reiji’s own bloodline. Jiro’s shinobi grandfather turns out to be a former Bureau member himself, which reframes Jiro’s animal-whisperer skills as the modern echo of a centuries-old spy tradition. The historical Oniwabanshu tracked disloyal officials. Their fictional descendants track mononoke instead, but the DNA of a secretive, shogun-loyal agency is still very much there.
Knowing the real history makes Jiro’s clan drama land harder. This was never just a cool ninja team name, it’s a several-century-old institution the show is actively rewriting in real time.
Black Torch airs new episodes weekly on Saturdays.