Then again, how many films released recently feature references to John Dickson Carr and the Locked Room Lecture...?
The first Detective Chinatown was a pleasant surprise when I first saw it a few years back, presenting a funny action-comedy film that actually had a satisfying locked room mystery. The second one I didn't like at all though, and I didn't even bother with writing a review. So the third one could go both ways. Would it be a surprisingly solid mystery film like the first, or would it be a disappoint like the second? Detective Chinatown 3 was given a major release in Japan recently (not strange considering the Japan setting and the many Japanese actors who star in the film) and reception was pretty positive, also regarding the mystery aspect, so I decided to take a look at this one too.
The elaborate action sequence that opens the film sets the mood immediately, making sure you won't mistake this zany film for a "serious" mystery film, but despite that, the investigation into the locked room murder is definitely the core of this film and overall, it's fairly entertaining. After the chaotic opening scene, we are quickly introduced to the relatively simple locked room situation: the victim and the suspect were the only persons actually inside the the pavilion in the middle of a small lake, while there were security cameras and members from both gangs stationed immediately outside the pavilion, meaning nobody could have gone in or outside without being noticed. Some flashy deduction scenes here quickly inform the viewer that they are probably not always given the opportunity to think about all the clues for themselves as things move pretty swiftly, but it's entertaining to see and the movie is indeed presenting a genuine locked room mystery. Having both Qin Feng and Noda present makes for some nice dynamics: in the first film, Qin Feng was obviously the brilliant fan of detective fiction, while his uncle Tang Ren functioned as the troublemaker charged with the physical action/comedy, but in this film, we also have Noda function as a rival detective/friend for Qin Feng and they use each other as sounding boards like Conan and Hattori in Detective Conan. By the way, did Noda's actor Tsumabuki Satoshi study Chinese for his starring role this time, because I don't remember him speaking this much Chinese in the second film (where he admitttedly had a smaller role)?
It's a shame that Detective Chinatown 3 changes in a completely different film halfway though. A witness who may hold vital information necessary to solve the locked room murder disappears at one point and then the film suddenly becomes Lethal Weapon 3. I think it's trying to set-up/tie in with sequels/spin-offs as we're introduced to a secondary plotline that involves more of the detectives active on the detective app Crimaster as seen in the second film, but it feels like it's a completely different film, about a completely different case. The implementation of this mid-section is incredibly clumsy and while it can be quite amusing at times (the cosplay event!) and also features a few scenes that look really great, it just feels out of place, as it's nothing at all like the story segments that precede or follow it. The whole mid-section could've been cut out of the film and you'd still have a completely coherent story. Actually, the story would be more coherent without the mid-section. A major part of this secondary plotline relies on your knowledge of the previous films and if you aren't familiar with them, a lot of terms and names will just ring no bells, leaving you with a mid-section that doesn't seem to go anywhere. Perhaps this part will feel more important when the pay-off comes in subsequent films, but for now, it's just a different story they forcefully added to another.
But back to the main mystery. While considering all the plausible scenarios that could explain the locked room murder, Qin Feng even quotes his beloved John Dickson Carr and he even compares the situation they are facing with the Locked Room Lecture, hoping to find a category that fits their problem (this visual sequence here is pretty awesome!) But when at the conclusion, Qin Feng declares that this is a completely new type of locked room not covered by Carr... let's say he's exaggerating a bit. A bit a lot. Had this been a Detective Conan episode, this locked room murder would just have been an average twenty-minute anime original episode, as the solution is neither surprising nor original. Perhaps if you're not used to mystery fiction, but then again, then quoting John Dickson Carr wouldn't mean anything to you in the first place, so it's as if were trying to sell off a simple locked room murder to both people not particlarly interested in detective fiction, as well as to die-hard fans. It's a functional mental problem, and while the locked room situation of the first film still remains the best of the series, it is worked out in a competent manner in terms of clewing.
Overall, the film is entertaing to watch though. It has a distinct, slapstick comic-like vibe to it, which some may like and some may not, but I quite like the over-the-top characters and the silly action scenes that are interspersed throughout the story (which is perhaps partially why I didn't like the second film, which tried to be too serious at times). There's a funny slapstick scene in the morgue early in the film for example, while the various detectives running into each other never seems to feel boring.
Detective Chinatown 3 is by no means a perfect murder mystery film. It has a simple, but passable locked room murder mystery that is presented in a flashy and visually engrossing manner, but the story is interrupted halfway with a completely different story and depending on how invested you are in the Detective Chinatown mythos, this part might feel completely out of place. The comic-like vibe is one I like though, and while the mystery plot is quite simple, I found the overall film amusing to watch, even if not all the parts made as much sense as others. If you're just looking for two hours of mystery-related entertainment (with lots of comedy/action), you could do much worse than this. If you have already seen the previous Detective Chinatowns and liked them, I'd definitely recommend watching this.