A "train detective" saga recently unfolded on Japan's X (formerly Twitter), all thanks to an idol who posted a photo from inside a train, challenging fans with "Can you guess which line I'm on?"
What started as a fun little fan interaction quickly spiraled into a full-blown investigation by a train expert. This rail whiz meticulously deduced the possibilities, narrowing down the potential lines from an initial nine to just four, using clues like the train model, in-car ads, past posts, clothing, and even the idol's activity location. Netizens were absolutely floored, calling it a real-life "Detective Conan" moment!
The whole thing kicked off when "Jounai Shimei" from idol group RAViDAVi snapped a pic inside a train car and posted it with the caption: "Which train line is this? Can you guess?"
What seemed like a casual social media interaction quickly summoned a true master. Train enthusiast Futasshi (@PON_PON_PONSHU) immediately launched into a professional analysis:
First, he identified the train's interior as belonging to the "Tobu 50000 series (including 50050/50070 series)." This particular train model operates on the following nine lines:
Tobu Isesaki Line, Tobu Nikko Line, Tobu Tojo Line, Tokyo Metro Yurakucho Line, Tokyo Metro Hanzomon Line, Tokyo Metro Fukutoshin Line, Tokyu Den-en-toshi Line, Tokyu Toyoko Line, and Minatomirai Line.
However, without clues like the scenery outside the window or LCD display content, he could only confirm it was "one of these nine lines."
But the analysis didn't stop there! Futasshi dug deeper, unearthing posts from the idol's management team from the same day. By comparing outfits and hairstyles, he deduced that both photos were taken on the same day, when the idol was attending a lesson at Studio Mission in "Dogenzaka, Shibuya Ward, Tokyo." From this geographical clue, he reasoned that if the idol departed from Shibuya and boarded a Tobu 50000 series train, the most probable lines remaining were:
Tokyo Metro Fukutoshin Line, Tokyo Metro Hanzomon Line, Tokyu Den-en-toshi Line, and Tokyu Toyoko Line. Just like that, the possibilities were slashed from nine to a mere four!
Another netizen chimed in, spotting a sticker of Tobu Railway's promotional character, "Himemiya Nana," in the photo. This sticker is only found on trains that operate directly on the "Tobu Tojo Line." Plus, a recruitment ad for "Tobu Bus" in the background further pointed towards the Tojo Line area.
This brought the deduction even closer, leaving only the Fukutoshin Line, Toyoko Line, and their direct through-service sections (Tojo Line, Minatomirai Line). This level of analysis truly showcases the incredible prowess of train otaku!
The entire incident quickly went viral on X, with countless netizens flocking to witness the spectacle. Comments poured in like: "This should be used as internet literacy teaching material!" "This is the power of a train otaku!" "They pretty much guessed it all, so strong!" "It'd be terrifying if it were a bad guy, thankfully it's a good one!" and "This is the true spirit of X!"
While the analysis was undeniably entertaining, it also sparked a sobering realization among many netizens: "With just a tiny bit of information, a stranger could genuinely figure out where you are." Many called the post a "prime example of online safety," serving as a stark reminder for everyone to be careful not to inadvertently leak too much personal information when posting on social media.
Still, it undeniably highlighted the incredible capabilities of train enthusiasts – give them just one photo and a few crumbs of info, and they can track down even the train you're riding!
via： togetter