The Black Market

Lore & Background

The Black Market in Sakamoto Days operates on a simple, brutal logic: in a world where assassins are ranked, contracts are signed, and violence is a profession, someone must supply the tools and information that make that profession possible. Guns, silencers, custom blades, encrypted communication gear, forged documents, and stolen data all flow through channels that no legitimate manufacturer or retailer would touch. These channels are maintained by a web of intermediaries—brokers who know every buyer's preference, every seller's weakness, and every safehouse's rotation schedule.

What makes the Black Market distinct in this story's world is its proximity to the mundane. The story is set in an otherwise ordinary Japanese urban landscape, and the Black Market thrives precisely because of that contrast. A convenience store might sit three blocks from a back-alley weapons exchange. A school hallway might be minutes from a black-market information broker's office. This juxtaposition is central to Sakamoto Days' tone: the extraordinary is always one street over from the everyday, and the retired top assassin who now stocks shelves and makes onigiri is the perfect embodiment of that duality.

The market also functions as a narrative pressure valve. Characters who need a specific weapon, a particular piece of intelligence, or a service that no legitimate source can provide are driven into the Black Market's orbit, and it is there that alliances form, betrayals are hatched, and the story's conflicts escalate. It is the connective tissue between the individual assassin's story and the larger criminal ecosystem.

In Their Own Story

The rain had a way of making the back alley smell like rust and old neon. Kenji adjusted the collar of his jacket, counting the yen in his pocket for the third time. The broker's door was unmarked—just a sliver of amber light beneath a steel frame on a side street that didn't appear on any map he'd checked. He knocked twice, paused, knocked once. The light went out. A moment later, a panel slid open just enough for a voice to drift out, low and unhurried, asking if he was the one who needed the suppressor with the ceramic core. Kenji exhaled. He hadn't even told his name yet. He stepped inside, and the smell of machine oil and cold coffee hit him like a wall. On the counter, a matte-black cylinder sat under a single fluorescent tube, waiting as if it had been there all along, as if the whole market had been built around the moment he walked in.

Reader's Guide

The Black Market in Sakamoto Days is the decentralized underground economy that supplies the criminal and assassin world with weapons, custom equipment, intelligence, and illicit services. It is not a single organization or location but a network of brokers, safehouses, and back-channel dealers operating across Japanese urban areas, often in plain sight beside ordinary businesses.

Its importance to the story is structural: the assassin world depicted in Sakamoto Days depends on this infrastructure to function. Contracts require tools, tools require suppliers, and suppliers require a market. The Black Market is where that chain is maintained, and it is where characters are pushed when legitimate channels fail them. It also serves as a narrative crossroads—multiple factions, rivalries, and power struggles intersect in its back rooms.

Related elements include the ranked assassin system (which creates demand for top-tier gear), the criminal organizations that both feed into and are fed by the market, and the broader theme of duality between the ordinary and the extraordinary. Characters like Sakamoto, whose past as the top assassin places him at the apex of the demand side, represent the human cost of a system that the Black Market quietly sustains.

Did You Know?

• The Black Market's power in Sakamoto Days comes from its decentralization—there is no single leader to remove, making it nearly impossible for any one faction to shut it down.
• The story's setting in ordinary Japanese city life means Black Market activity can occur blocks away from convenience stores, schools, and family homes, reinforcing the series' theme of the extraordinary hiding in the ev
• Sakamoto's retirement from the top assassin rank and his new life running a convenience store make him a living symbol of the distance between the Black Market's world and the surface world.
• The market's role as a supplier of both weapons and information means it is a pressure point for nearly every major conflict in the story, from personal vendettas to larger organizational power struggles.