The SIS contact's name is Kuramoto Daiki.
Rei gives me this on the way there, sitting in the back of the rental with Nishida driving and Tokyo sliding past the windows in the particular gray of late afternoon, the city shifting from its daytime register to its evening one, the light changing quality without changing color.
"He's been with the Special Investigation Squad for nine years," she says. Quiet, factual, the briefing register. "He opened a preliminary file on Ryūsei three years ago based on financial anomalies in the municipal contract records. He couldn't build sufficient predicate to justify full investigation without evidence of the human connection." She pauses. "He closed the file officially. He didn't close it actually."
"How do you know him."
"He and Mizore knew each other. Professionally. He was one of her institutional contacts, someone she could approach when she needed to understand the legal threshold for evidence she was developing." A pause. "He introduced us fourteen months ago. He thought my position inside the Metropolitan Police might be useful to the case he couldn't officially pursue."
Fourteen months. She's been connected to this case for fourteen months. Before Saitō moved to Shinjuku. Before Mizore started the formal investigation. Before any of last night.
"He knows about you," I say. "Your involvement."
"He knows I was working with Mizore. He doesn't know the extent." She looks at the window. "He doesn't know about Saitō."
"He's going to need to."
"Yes." A pause. "That's the part of tonight I haven't fully planned."
I look at her profile against the window. The careful arrangement of her expression, the controlled surface that I'm beginning to read the way you learn to read a specific language, not word by word but in the rhythm and cadence of the whole. She's not worried about the SIS meeting. She's worried about explaining me.
Explaining who I am in relation to Saitō's evidence and Saitō's body without having language for what I actually am.
I don't have language for it either.
We stop at a building in Kasumigaseki that doesn't announce itself. Government adjacent, the kind of structure that exists in the administrative district without drawing the particular attention that official buildings draw. Kuramoto meets us at a side entrance, which tells me he's been thinking about cameras and institutional record since Rei called him.
He's mid-forties, unremarkable in the specific way of people who have chosen to be, the kind of face that doesn't anchor in memory. He looks at Rei first, then Nishida, then me. His look at me lasts a beat longer than the others.
"Saitō Kurō," he says.
"Yes," I say.
He holds the door. We go in.
The room he takes us to is below street level, accessed through a stairwell that isn't on the building directory. Small, clean, no windows, a table with four chairs and a recording device that he turns face down on the table as we sit, a gesture that functions as both reassurance and acknowledgment that this conversation is happening in the space between official and not.
He looks at the waterproof bag I set on the table.
"Rei told me you had Saitō's insurance," he says. Not to me specifically. To the room.
"Hard drive, documents, payment list," I say. "Sector three of the drive is decrypted. It contains the full biography and transaction history for the individual at the top of the organizational structure."
Kuramoto is very still. "You decrypted sector three."
"This afternoon."
"Saitō told Mizore sector three existed," he says slowly. "She told me. She said he'd encrypted it separately because the name required a different level of protection." He looks at the bag. "She died before he gave her the key."
"He left it in a letter," I say. "With the cache."
Kuramoto looks at me with the careful attention of someone recalibrating in real time. Not the same recalibration as Rei and Nishida, not the recognition of something wrong about who's wearing this face. Something more professional. He's assessing how much I know and how I came to know it and whether the two things are consistent with each other.
"You found the cache," he says.
"This morning."
"Saitō kept that location from everyone. Including Mizore. Including Nishida." He pauses. "Including me."
"He kept it for himself," I say. "In case everyone else was gone."
A silence. Kuramoto looks at Nishida, who says nothing. Looks at Rei, who gives him the smallest nod, the kind that means: I know. Let it go for now.
He opens his hands on the table. "Show me sector three."
Nishida opens the laptop. Kuramoto reads Yamamoto's file in silence. He reads it the way Rei read Saitō's letter, line by line, with the focused precision of someone who needs every word. When he reaches the end he sits back and he does something I haven't seen any of the others do.
He closes his eyes.
Not long. Three seconds. The specific gesture of someone who has been carrying a weight for a long time and has just been shown that the weight is exactly as heavy as they thought it was.
He opens his eyes. "Nine years," he says. "I've been inside this building for nine years and I've been looking at the edges of Yamamoto's structure for three of them without being able to name it." He looks at the screen. "Mizore was two weeks away from having enough for the preliminary filing. That's why she needed Saitō's confirmation. Not for the financial structure, she had that. For the human identity at the top." He pauses. "That's why she died when she did."
"Someone told Tomura she was close," Rei says.
"Someone told Yamamoto," I say. "Tomura is the mechanism. Yamamoto made the call."
Kuramoto looks at me again with the same careful attention. "You think clearly for someone who spent last night in a holding cell."
"I've had a focused morning."
Something moves in his expression. Not humor exactly. The acknowledgment of it, the recognition of someone using a particular kind of deflection he's encountered before.
He looks at the documents. The payment list. The organizational diagram with the unnamed box now named. He reads the letter last, which Rei slides across the table without comment. He reads it and sets it down and doesn't comment on it either.
"What I can do," he says, "is open the formal investigation under Special Investigation Squad authority. Predicate established by the evidence package. Independent of the Metropolitan Police chain." He pauses. "What that triggers, immediately, is an automatic notification to the Public Prosecutors Office and the Ministry of Justice. Yamamoto cannot shut down an SIS investigation without involving multiple institutional actors, each of whom becomes a witness to the attempt."
"It creates a structure he can't quietly collapse," Nishida says.
"Correct. It also," Kuramoto continues, "creates a target. Once the filing is logged, Yamamoto knows it exists. He can't kill the investigation but he can manage the timeline, introduce complications, challenge the evidence chain." He looks at the drive. "Every hour between filing and formal charge is an hour he's working against us."
"How long from filing to formal charge," Rei asks.
"With this evidence package, properly documented and submitted, two weeks minimum. Realistically three." He pauses. "A lot can happen in three weeks."
"But once it's filed," I say. "Once the SIS investigation is formally open and the Ministry of Justice is notified. He can't make it go away."
"No. He cannot." Kuramoto folds his hands. "What he can do is move against the people who filed it. And the people who provided the evidence." He looks around the table. "All of you become significantly more exposed the moment I log this."
The room sits with that.
Exposed. A precise word for a specific condition, the state of being outside the protection of institutional structure, visible to someone who has fifteen years of experience using institutional structure as a weapon.
"There's a secondary problem," Kuramoto says. "The Minami source. The internal Ryūsei documentation on the drive covers the financial architecture but it has gaps. The transaction history ends fourteen months ago." He points to a specific section on the screen. "After Saitō left, Minami continued building. Whatever they've compiled in the fourteen months since, it's not on this drive. It's wherever Minami keeps it."
"We're meeting Minami tonight," Rei says.
Kuramoto looks at her. "You have contact."
"Since this morning."
"If Minami has fourteen months of additional documentation," he says slowly, "the evidence package becomes significantly stronger. Strong enough that the two-to-three week window for formal charge could compress." He pauses. "Significantly."
"How significantly," I say.
"With a complete internal record spanning the full fifteen years of Yamamoto's involvement, properly authenticated by a source who can testify to chain of custody." He pauses. "Days rather than weeks."
The word lands in the room and stays there.
Days.
The distance between Yamamoto Hiroshi managing a situation he believes is nearly resolved and Yamamoto Hiroshi facing a formal charge by the Public Prosecutors Office compressed into a unit of time that doesn't allow for the kind of countermeasures that weeks allow.
"The forty-eight hours," I say. "You mentioned a window."
Kuramoto nods. "I have a colleague in the Ministry of Justice. She's been aware of my informal file on Ryūsei for two years. She's agreed to hold a submission slot open for forty-eight hours from tonight. After forty-eight hours, the slot closes and we wait for the next procedural window." He looks at the table. "The next window is six weeks from now."
"Six weeks is too long," Rei says.
"Yes."
"So we have forty-eight hours to get Minami's documentation and submit the complete package," I say.
"Forty-eight hours to do that and to ensure all four of us and Minami are in positions that are difficult to reach quietly." He pauses. "Yamamoto will know within hours of the filing. His first move will be against the people who built the case. His second move will be against the evidence chain." He looks at me specifically. "You are the most exposed. You're out on bail for a murder charge that Yamamoto's people constructed. The moment the filing happens, that charge becomes a tool."
"He'll push for revocation of bail," Nishida says. "Get Saitō back in custody before the case can develop."
"Within the first twelve hours of filing, almost certainly." Kuramoto looks at me. "You need to be somewhere that makes that difficult."
"Difficult how."
"Publicly visible. Documented. In a location and context that makes a quiet revocation procedurally complicated." He pauses. "I can arrange that but it requires you to trust me with your location for the next forty-eight hours."
I look at Rei.
She's already looking at me.
The look lasts two seconds. It doesn't require words because the words would only be a slower version of what passes between us in those two seconds, the specific communication of people who have built enough shared context in a single day that some things have stopped needing to be said out loud.
"All right," I say to Kuramoto.
He nods. He looks at his watch. "The Minami meeting. What time."
"They set the location. We're waiting for confirmation."
As if on cue, Saitō's phone vibrates on the table.
We all look at it.
A single message from the contact labeled South.
Midnight. Yanaka Cemetery. The Saitō family grave. Come alone or don't come.
I read it twice.
The Saitō family grave.
Minami knows where Saitō's mother is buried. Minami chose that specific location, out of every location in Tokyo, for a midnight meeting with a man they believe is dead.
Either it's a trap built by someone who knows Saitō's history in enough detail to weaponize it.
Or it's a message from someone who knew Saitō well enough to understand that there is only one place in this city where he would come without hesitation.
I look at the message.
I look at the room.
"Yanaka Cemetery," I say. "Midnight."
Forty hours left in the window.