The Treasure in the Royal Tower

自宅のソファーに腰掛けて、一冊の小説を開いた。表紙には『桜野美海子の最期』というタイトルが記されている。

"I sat down in my sofa at home and opened a book. The title on the cover said The End of Sakurano Mimiko.

"The End of the Great Detective Sakurano Mimiko"

Earlier this year, I reviewed two novels which were originally published on websites where (amateur) writers can post their stories for everyone to read, but which were later picked up by major publishers. Robber Rabbit Gets Dead was originally published on Kakuyomu, while Isekai no Meitantei 1 originated from Shousetsuka ni Narou. Rinno Mei's Meitantei Sakurano Mimiko no Saigo ("The End of the Great Detective Sakurano Mimiko", 2015) is also published on Shousetsuka ni Narou and can be read for free there (see the link), but has not been picked up by a major publisher yet.

While she's still fairly young, Sakurano Mimiko is already a well-known detective, not in the least thanks to the literary efforts of her childhood friend, occasional assistant and chronicler Tsukaba Souta, who has turned all of their adventures into best-selling novels. Mimiko is also a great fan of mystery fiction, so she was very happy when she received an invitation by the famous mystery writer Shishitani Keizou. Many knew about the curious tower Shishitani had built in the mountains, as it was like one of the odd buildings from his novels: a gigantic cylindrical tower stood in the middle of nowhere, and oddly enough, the building featured no windows whatsoever. An elevator and spiral staircase at the exact center of the tower connected all the floors, but there was no way to even take a look at the outside world except for the front entrance. Mimiko and Tsukaba weren't the only ones to be invited to this tower, as four other detectives (and their "plus one") were also invited. The detectives are quite a colorful lot, ranging from a girl who seems barely in her teens to a bombastic man who might or might not be a relative of Napoleon Bonaparte. Everyone expects Shishitani to have a surprise for them, and he doesn't disappoint his guests. He declares he has a mystery for them to solve, and soon after, Shishitani disappears from his locked study at the top floor, even though only he and one of the maids have the key to the room. At first, everybody thinks this is just a game by Shishitani, a challenge to see whether these real detectives can figure out how he disappeared from a locked room, but the following morning, one of the maids is found dead in the main hall, and strangely enough, she seems to have fallen from a great height, even though there's no such place to fall from in this tower. When one of the detectives is later found decapitated, the group starts to suspect that the serial killer Jack the Head Cutter has found his way to the tower, but with the single entrance locked from the outside, can the detectives survive long enough to solve the mystery?

Oh, and to be precise: I haven't actually read the story. For Meitantei Sakurano Mimiko no Saigo was adapted by the group Seien Bunko as an audio drama in 2018, which you can find on their Youtube channel. It's quite lengthy, clocking in at several hours, but it's quite nice to listen to, and a perfectly fine way to experience this story.

Anyway, the story starts off in a very familiar, And Then There Were None-like manner with people who don't know each other gathered at an isolated location (the curious tower). Shishitani first speaks with his guests during dinner over a video connection, which again invokes the early chapters of Christie's masterpiece. Soon after the chaos starts, and man, a lot happens. A mysterious murder (the maid who fell from an impossible height), decapitated bodies, the people being locked up in the tower from the outside in a closed circle situation, a disappearance from a locked room, a dying message and the list goes on. All the popular tropes of mystery fiction can be found within this tale, and considering we have multiple detectives on scene, you can also expect a few deduction battles between the detectives, as each of them tries to solve the case before the others can. It's an incredibly dense story, perhaps to a fault, as you are barely given any time for consideration, with events following each other in a very rapid way.

It's therefore slightly disappointing that most of the murders in this tale don't leave any impression on their own. A fair number of the murders are 'oh, multiple suspects had the opportunity to commit them' and 'we don't have enough data to point at one single person for sure.' Elements like the locked room disappearance, the decapitations and the dying message feature very familiar tropes as their solutions, so it's difficult to feel truly impressed. A lot of the happenings also seem very dependent on luck, with people acting like they do in the novel more to make the mystery more complex, rather than because it makes any sense to do so at that moment. That said, I liked the one major idea of this novel. It's a neatly hidden, but also fairly audacious trick, and Rinno smartly used this idea not only once, but multiple times with very different results. It's by realizing that two seemingly seperate events are actually connected by the one and same underlying concept that you can arrive at the solution, and this part was quite smartly planned. This idea alone would've made for a really interesting mystery story, if it had focused solely on it.

I think most people will agree that Meitantei Sakurano Mimiko no Saigo is far more memorable as a mystery story about detecive fiction, as it actively addresses detective fiction as a genre from a post-modern point of view. Mimiko discusses her views on detective fiction and their limitations throughout the story, and these themes come back in a haunting way at the conclusion of the story. One literary-philosophical problem in mystery fiction in particular is of essence, one which I have mentioned a few times in other reviews but won't explicitly name here. If you're looking for a sincere/honest/pure mystery story, this one is not for you, as it really tries to show the meta-limitations of the literary detective and can leave a very nasty aftertaste. I think that the execution is not completely fair to the reader, and especially the epilogue tries to hard to throw one plot twist after another at the reader, but I think that Rinno did an interesting job writing a full mystery novel based on what is actually a philosophical approach to the detective story.

In the end, I don't think Meitantei Sakurano Mimiko no Saigo is a mystery story for everyone. If you expect a Christie or Carr homage, you're at the wrong place. Queen.... you're a bit closer. Most of the individual murders won't leave much of an impression, though it definitely has a memorable main trick. What Meitantei Sakurano Mimiko no Saigo makes an interesting experience, even if not perfect, is the way in which it addresses fundamental, philosophical approaches to the mystery fiction genre, and uses those ideas as the basis of a mystery plot itself. It's not completely convicing as a whole, but definitely a story that gives you food for thought.

Original Japanese title(s): 凛野冥（原）セイエン文庫『名探偵・桜野美海子の最期』