Never been on a night train before, so I'd like to try it one day... night...
Namba agrees to look into the case one final time, and the lawyer Sakurai recommends Susa as Namba's assistant, though the former isn't too keen on having a related party helping him, so he only occasionally uses Susa as a soundboard while investigating the possibility someone might have manipulated Takizawa's movements that evening for some reason. But each time Namba thinks he has an idea who the murderer might be, a new death occurs, changing his views on the case, and as things develop more, Funatomike no Sangeki ("The Tragedy of the Funatomis", 1936) seems to head straight towards an unsolvable state, until the international detective Akagaki Takio appears in front of him...
Funatomike no Sangeki ("The Tragedy of the Funatomis") is one of the most important mystery novels in Japanese mystery history, as it is commonly seen as the very first Japanese mystery novel involving a railway schedule-based alibi trick. The author is Fujita Yuuzou (1909-1975), though he used the pen name Aoi Yuu, and it should be noted some sources say his given pen name was read Takeshi, so you'll see both Aoi Yuu and Aoi Takeshi when they bother to write out his name in hiranaga or romaji. Aoi was an engineer for a power company by profession, but was also a big fan of mystery fiction, and debuted in 1934 with a short story published in the magazine Profile. The following year, he decided to write his first full-length novel to compete in a competition for unpublished novel manuscripts. It was Edogawa Rampo who was a huge fan of the story which was originally titled Satsujinma ("The Murderer"), but retitled as Funatomike no Sangeki when it was published in 1936. And as I mentioned earlier, it is commonly seen as the first Japanese novel that involved an alibi trick based on railway tables in the spirit of Freeman Wills Crofts. Post-war authors like Matsumoto Seichou and of course Ayukawa Tetsuya were greatly inspired by Aoi's work.
As a first novel, and one in the context of 1930s Japanese mystery fiction, I'd this book is insanely ambitious, and while I don't think Aoi manages to pull off everything perfectly, it's genuinely impressive how Aoi does a lot of things authors like Ayukawa and Matsumoto would also do, only two, three decades earlier. The one thing I have to say first, is that Funatomike no Sangeki is packed. A lot happens, and Aoi really does his best to keep the reader entertained by having many story developments and twists and turns, and also revealing parts of the mystery little by little. Unlike Rampo's 1930s output, Aoi is obviously going for Croftian realism, and he meticulously explains how Namba is conducting his investigation, but a great advantage of that style is that you are constantly making progess in terms of unrafeling the mystery: like the Croftian police procedural, Namba keeps making small steps, solving parts of the mystery that allow him to move forward to find new clues that again allow him to make other discoveries. The scale of the story is huge, as we move from the western part of the main island of Japan to the central parts and visit many cities and towns, as take as many train lines on our way there. Namba is actively trying to locate the 'invisible' murderer is and it often feels like he's close on their trail, so there's always a feeling of tension, as for all we know Namba could only be a few steps behind the murderer.
At the same time... Aoi writes in a rather dry and slow manner, and I have to admit, while I think the overall plot was interesting, his writing did tire me a lot, and I felt the book could have been told in a much more entertaining manner (oh, how I wish Rampo wrote this based on Aoi's plot). Of course, I understand he was going for the Crofts style, but you do really need to be in the right mindset to be reading this, because while it's perfectly readable, sometimes you do wonder why the story is told in such a dry, and yet at times roundabout manner...
Aoi's talents as a mystery writer are clearly visible in this work though. While a lot of the ideas showcases in this book will feel outdated and too tropey for the modern reader, some ideas I genuinely find surprising to find in a 1935 Japanese mystery novel. And then there's of course the railway schedule-based alibi trick, apparently the first original Japanese one and one which would thus influence writers like Matsumoto Seichou, Ayukawa Tetsuya and Nishimura Kyoutarou. It's a bit sad how nowadays we can just use map and navigation maps to find all kinds of combinations of public transport modes to find the fastest way to get from A to B, because it takes a lot away from the surprise in these kinds of books. Here too some of the "the killer used this other route that was actually also available!" surprises feel a bit underwhelming partially because you can't shake the feeling it's a bit weird nobody thought of that earlier, but also because of Aoi's writing style,where he throws these reveals at you without much build-up ("Namba looked at the map and suddenly realized there was another route"), so you don't get the sensation of satisfaction when the solution is revealed. Still, Aoi uses the alibi tricks in a clever manner/for a clever purpose, so on the whole, I think the book works.
Though I don't really get Aoi undermining Namba right from the beginning, because we have Namba in the list of characters, but then at the end we see the name of another detective in the list, and he's introduced as an internationally renowned master detective... The cast of characters is also rather limited despite the book's length, so it might be a bit easy to guess who the murderer is because not many people on the list are still alive at the end of the story... The book also makes reference to a certain 1922 mystery novel that is utilized in an interesting way in this story, though it's a bit of a borderline case whether mentioning the title out loud will spoil part of Funatomike no Sangeki's mystery, so I'll refrain from doing so now...
So while I do think some of Funatomike no Sangeki might feel a bit outdated now, both in writing and the mystery tropes it uses, it is a surprisingly ambitious first novel by Aoi Yuu and as it is commonly recognized as the first in a looooooong tradition of Japanese railway-based alibi-deconstruction mystery stories, I'd say it's worth reading it if you happen to come across it.