6/30/25

Visitors to the Isolated Island (2020) by Kie Houjou

Last year, Kie Houjou became one of my favorite mystery writers on the strength of two novels, Jikuu ryokousha no sunadokei (The Time Traveler's Hourglass, 2019) and Meitantei ni kanbi naru shi wo (Delicious Death for Detectives, 2022), which are respectively the first and third title in the "Ryuuzen Clan" series – translated by Mitsuda Madoy and "cosmiicnana." Technically, they're hybrid mysteries. The Time Traveler's Hourglass weaves time travel into an intricate, immaculately-plotted detective novel and Delicious Death for Detectives entrenched its plot in an immerse, futuristic Virtual Reality game. However, they're so very well done, well rounded and incredibly innovative mysteries, it would be more accurate to call them the detective series of tomorrow. I especially can see Delicious Death for Detectives becoming the classic detective novel from the first-half of this century (i.e. comparable to Agatha Christie's And Then There Were None, 1939).

I had a sneaking suspicion the second book in the series, Katou no raihousha (Visitors to the Isolated Island, 2020), could become my favorite. A suspicion that proved to be not far off the mark!

Kie Houjou's Visitors to the Isolated Island is the second title in the "Ryuuzen Clan" series, but Meister Hora only appears in the foreword to assure the reader that although "the events of the story seem absurd, there is no need for you to fear" as it will remain a detective story at heart ("I value fair play above all else"). Kamo Touma is only mentioned as the author of an article on the titular island in the Unsolved Mysteries magazine. Instead, the story focuses on Kamo's brother-in-law, Ryuuzen Yuki, who's the Assistant Director at J. Production en route to the lush, now uninhabited Kakuriyo Island to shoot a TV special for the World's Mysteries Detective Club show – which is going to spotlight the 1974 "Beast of Kakuriyo Island" incident. A mass murder robbing the island of the last of its last inhabitants.

Kakuriyo Island, "a perpetual summer paradise," actually consists two islands. A bigger, oval shaped island and a smaller tidal island, known as the Divine Land, which is connected to the main island during low tide when a gravel path appears. In 1974, the entire population (12), in addition to a visiting professor researching folklore, was wiped out in a single night with bodies found in different locations. All the victims had one thing in common: they had been stabbed in the heart by "a cone-shaped object." The police concluded the visiting scholar, Professor Sasakura, killed the islanders when caught digging up the cemetery looking for buried treasure. And died himself in a struggle with the last victim. Furthermore, the police believe the dogs kept on the island were responsible for savaging Professor Saskura's body. A conclusion that doesn't satisfy or hold up, as outlined in Kamo's article, but that's where the case stood for nearly half a century.

Fast forward to 2019, Yuki has come to Kakuriyo Island not only as the assistant director, but to get revenge for a friend whose death can be blamed on certain members of the production company.

However, Yuki plans to break with long-standing (shin) honkaku traditions by opting for practical methods rather than "crimes patterned on old legends or nursery rhymes and serial killings in villas," because locked room murders, fabricated alibis and other fictional crimes "were often useless in real life" – preferring to arouse as little suspicion and panic as possible. Only the appearance of a great detective, which is why invited a well-known researcher of subtropical ecosystems and detective fiction enthusiast, Motegi Shinji, to "reveal a false truth prepared by Yuki." So imagine his annoyance when one of his prospective victims is impossibly killed in a way mirroring the 1974 murders. Unno Nisaburo, the director, is found stabbed through the heart on top of a bush with only his muddy footprints leading to the spot.

So the plot, up till this point, still sounds fairly conventional shin honkaku mystery with the customary closed circle of characters stuck on an isolated island when a murderer begins leaving bodies in bizarre or impossible circumstances. It could describe the plot of Yukito Ayatsuji's Jukkakukan no satsujin (The Decagon House Murders, 1987), MORI Hiroshi's Subete ga F ni naru (The Perfect Insider, 1996), NisiOisiN's Zaregoto series: kubikiri saikuru (Zaregoto, Book 1: The Kubikiri Cycle, 2002) or half the titles from The Kindaichi Case Files series. Not to forget Danro Kamosaki's recently reviewed Misshitsu kyouran jidai no satsujin – Zekkai no katou to nanatsu no trick (The Solitary Island in the Distant Sea and the Seven Tricks, 2022). Where Visitors to the Isolated Island begins to differ is when Yuki proves Sherlock Holmes' adage, "when you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth," correct. Yuki deduces from the circumstances in which the director was killed that "the so-called Beast of Kakuriyo Island actually exists." A creature not native to the island, our planet and perhaps not even from this reality!

 

 

Yuki's outlandish theory is quickly proven correct and places entirely new complexion on both their situation and that of the detective story. Now the problem is not trying to fit motive and opportunity to one of the suspects, but applying the art of deduction to unraveling the nature of the creature ("...so little information and so many unknowns..."). Where did it come from? What can it do? What are its limitations? How intelligent is it? How can they possibly protect themselves from it? One thing that's obvious from the start is the creature, called a Visitor, is halfway between a Chupacabra and a Skinwalker. It sucks living creatures, preferably humans, dry like a juice box. More disturbingly, it can take on the form of its victim in addition to some other distinctly non-human traits and abilities, but its “mimicry” poses a direct treat to the group. Visitor has the ability to replace someone in the group and this danger even extends to animals no smaller than a cat. So they not only have to find answers and trying to draw conclusions from the gathered information, but strategize in order to survive and prevent the Visitor from escaping the island.

A comparison can be drawn with the zombie hoard encircling the villa in Masahiro Imamura's Shijinso no satsujin (Death Among the Undead, 2017), but the Visitor presents the Yuki and the reader with a genuine, ultimate unknown – an intelligent, non-human interloper. An invasive species knocking humanity down a place on the food chain. And with every new discovery about the Visitor, it throws another complication on their various problems while the bodycount and suspicion steadily rises. So not exactly the same obstacle presented by the zombies from Death Among the Undead, but towards the end, the traits and abilities of the Visitors come into play when someone is bumped off while alone in a watched room with a dog guarding the hallway. Solutions to this impossible murder and Yuki's explanation twists and coils right up until the final pages with some wonderful, highly imaginative applications of the Visitor's abilities to the traditional, fair play detective story.

How fairly the game was played here is more impressive than how Kie Houjou handled the ultimate unknown within the confines of the traditional detective story. A good, non-spoilerish example is the coded message the original inhabitants left behind revealing the hiding place of a treasure trove of information on the Visitors. In my experience, Japanese code cracking stories, or subplots, rarely work in translation, but Yuki pointed out that "this code was made to be solved by a complete outsider to the island" – including the reader. Not only is the code 100% solvable, it's solution is a clue in itself. Houjou played it so fairly, she included two relatively short chapters from the perspective of the Visitor. I was, in fact, able to anticipate an important part of the solution without getting all the way. But it was fun trying to find my way in what's new territory for the detective story.

That's another noteworthy aspect of Visitors to the Isolated Island. It demonstrates why hybrid mysteries have become the next frontier for Japanese mystery writers. When done correctly, the hybrid mystery allows to break new ground and create new possibilities, while staying well within the framework of the classically-styled, fair play detective story. Visitors to the Isolated Island is a superb example of the fair play, hybrid mystery done right. Only drawback is how unrealistically perfect, almost dreamlike, all three novels are. Like a collective wish-fulfillment of detective fans come true!

So what else to say, except that The Time Traveler's Hourglass, Visitors to the Isolated Island and Delicious Death for Detectives deserve an official release in as many different languages as possible, because these three detective novels are going to be the classics of the 21st century. To quote Mitsuda Madoy, "they phenomenal, absolute masterpieces" and "boringly perfect" to boot. Highly recommended!

Note for the curious: yes, I know, I rambled on long enough, but something else I liked is how Visitors to the Isolated Island, an experimental hybrid mystery, embodies the past, present and future of the genre. Edgar Allan Poe's "The Murders in the Rue Morgue" (1841) was not only the first modern detective story and first official locked room mystery, but also the first hybrid mystery combining horror with a tale of ratiocination. A line can be drawn from Poe to this book and the direction the genre (in Japan) seems to be headed in the years ahead.

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