Two-Way Murder

"I remember now," she said, "what that German word is. Doppelganger!" 

"At Bertram's Hotel"

I seldom read summaries before reading the actual book, so based on the title, I was actually expecting this to be set in Europe and be about twin castles....

Nihonmatsu Kakeru has become the newest member of the Sealed Door club, a somewhat private university club, originally only created to investigate rooms that have been sealed and kept locked in houses, usually because of some kind of history behind it. Practically speaking though, it's just a group of friends hanging out, with rather unique characters like Narumi, who considers himself a Great Detective, Sakie, who might or might not have paranormal powers, Oomaeda who can open any lock and moodmaker Yui. One day, they are visited by high school teacher Toomine Yukihiko, who wants the members of the Sealed Door to come with him on his visit to Himuro Ryuukan, the grandfather of Himuro Ryouka, a girl in his class, but who has not appeared at school for a year now due to bullying. Last year, he visited Homuro Ryuukan's home too, when Ryouka had only missed a few days, and was told she'd return to school soon, but she never came back. But now he has received a letter signed by Ryuukan, telling him to come and that he'll be able to meet with Ryouka again. Toomine thinks Ryouka might be held captive in her grandfather's home, and therefore wants people of the Sealed Door club there so they can find the room and get her out. Ryuukan also happens to be the president of the famous mystery club Next Door,  which self-publishes its material, one of the members being the famous mystery writer Aoyama Masayo, and Narumi agrees to come with Toomine right away the next day in his own car, while the others, under the guidance of Sealed Door president Godou Satoru, will arrange for a van so they can go together the next day. When Toomine arrives at Ryuukan's large manor, which lies near the sea far away from town, he learns the other members of Next Door are also invited here, as well as three girls from his school who were some way involved in the bullying of Ryouka. Narumi initially wants to sneak around to look for Ryouka, but is soon captured... but then the members of the Sealed Door lose contact with him.

The rest of the Sealed Door change their plans and hurry to the Ryuukan residence, but when they arrive there they find it completely empty. They then get a phone call from Narumi, and they learn something shocking. Narumi and all the others have been moved to an exact copy of the Ryuukan manor, but with shuttered windows, and no door out or stairs up or down. They have no idea where they are, or why there are here. While they are calling, they both stumble upon something horrifying: in the "real" manor, Godou finds two decapitated bodies in the bathroom, while in the same bathroom in the "second" manor, Narumi finds two cut-off heads: those being of one of the high school students, as well as of the taxi driver who drove her there. To preserve Narumi's battery, they decide to call again later while both sides look for clues, but when the next call comes, another death has occured at the second house, and it appears the murderer should be one of those in the sealed house, but who? Can the members of the Sealed Room find the second house and open the closed circle in Kirisha Takumi's Doppelgänger-kyuu - Akazu no Tobira Kenkyuukai Ryuuhyoukan he ("The Doppelgänger Palace - The Sealed Door Club Goes to the Ryuuhou House", 1999)?

Kirisha Takumi made his debut as a professional novelist by winning the 12th Mephisto Award, leading to the publication of Doppelgänger-kyuu. While it is the first novel published, the book starts off right away with Kakeru realizing there's some kind of backstory to all the members of the Sealed Door club which they try to keep a secret for now, so that is something that might be explored in later novels. I had never read anything by Kirisha yet by the way, so this was also my "debut" with his work and going just by this book, I'd say Doppelgänger-kyuu is certainly not a perfect book, and a lot of it can be attributed to it being a debut novel, but there are mystery-wise definitely interesting elements, which make me curious to the rest of the series.

The oddest part of this book is definitely that this is a closed circle murder mystery... but also not. Early on, we learn Narumi and all the other guests at Ryuukan's house have been moved to a sealed copy of that house, and they get killed one by one. This is pretty standard closed circle fare, but unlike most, if not all, closed circle mysteries, this book doesn't really focus on the suspense of such a situation at all. For the narrative doesn't follow Narumi in the second house, it's completely focused on the rest of the members of the Sealed Door, while they are working with the police trying to figure out where the other house is where Narumi and the others have been brought to, and discussing the murders that have occured both in the real and the second house. So unlike Jukkakukan no Satsujin (The Decagon House Murders), which also has a dual structure where you follow a closed circle situation on the island, but also an investigation on the mainland, Doppelgänger-kyuu focuses mainly on what happens in the "safe area", while we only get occasional updates on what is going on in the second house via phone calls. The tone is therefore also surprisingly light, as there's more focus on the (mis)adventures of Kakeru and Yui as they bumble around (with good intentions) to find clues, rather than a focus on a tense situation where people get killed off one by one and people starting to suspect each other. We only get to hear about the closed circle situation second-hand, and we basically never even got a real look at all the characters in the second house before Narumi called the others, so we don't really know them at all: we constantly see the closed circle situation via a filter, hearing about events after they have happened, and that makes this a very weird experience to read, if you're familiar with closed circle mysteries. It doesn't help the people in the second house are.... completely stupid by not following Godou's instructions about sticking together and not go exploring the house alone, so you feel no sympathy for them whatsoever, even if one death in particular is supposed to be somewhat emotional.

The investigation in this novel therefore focuses a lot on the background of the crime, as we aren't really there "on the scene": why has everybody been taken away to a second house, and where is this second house? I liked the mystery surrounding the location second house, even if the solution wasn't that surprising (it's revealed about 70% into the book), though I think it could have used more clues: a lot of the revelation ushured in by Godou depends more on pure intuition rather than actually clues we had seen ourselves properly. Somewhat frustrating is that Godou keeps on telling the police they are completely wrong and looking for the second house in the wrong place, but he doesn't say why or what his thoughts then are until the very end! He doesn't even have a reason to keep quiet, as he's constantly saying he wants to save Narumi and the others, but then refuses to elaborate. One part of the misdirection is daring, but it comes a bit too close to the truth, and I think a lot of readers will figure it out tat that point. The mystery of the why is not as interesting, a lot of it is basically speculation based on flimsy clues/indications, and then we just get a revelation which feels a bit unearned. 

At this point, you'd think I hate this book, as you don't get to see a lot of the core mystery of the on-going murders in the second house, while the focal points of the investigation we do get to see, are the less interesting parts of the mystery. That said, on the whole, I didn't think this an awful book though, as they are, as mentioned, also interesting parts to the mystery. I definitely found the parts relating to identifying whodunnit quite clever, even if it's told in a rather roundabout manner. You'd think there'd a better way to lay down the hints for that revelation, but as it is now, it can feel a bit chaotic, even if there are some points about it that quite good mystery-wise. It gave a really good reason for some of the murders, and it also ties nicely back to one of the underlying themes of the book. But it is definitely an uneven book, that feels very much like a debut novel.

While most of the characters barely appear in the book, and the focus is on the Sealed Door members, even then some of them barely get anything to do. The banter between the various members of the Sealed Door is fun enough I guess, but obviously, it's not enough to carry a mystery novel. It's very much a main cast-character-focused mystery novel, but in this case, it seems it goes a bit too far, not giving the core mystery as much attention as it deserved, as I do think the actual events/happenings are interesting and make for a good mystery novel, but it is just told in a weirdly limited manner.

Is Doppelgänger-kyuu - Akazu no Tobira Kenkyuukai Ryuuhyoukan he a perfect debut novel? Not by any means. Its focus on a kinda rom-com between the core members of the Sealed Door somehow mean it also focuses less on the mystery than you'd expect from... a mystery novel, and while there are clever parts and clues in the book, a lot of it is told in a rather meandering manner. But going by what I have read here, I do think Kirisha might be able to pull a tighter mystery novel, so I'll definitely read more of this series!

Original Japanese title(s): 霧舎 巧『ドッペルゲンガー宮 《あかずの扉》研究会流氷館へ』