
Almost nobody notices them, but they’re reminders of a violent era in Japan’s past.
From the moment you set foot inside Tokyo Station, you’ll see that it’s full of travelers, train lines, and souvenir shops. But what might not be so obvious is that it’s also full of secrets.
Well, we suppose you could argue that they’re not secrets so much as things almost nobody notices, despite their deep significance. That’s not to say that people are inattentive, though. The first one we’re looking at today, for example, is hiding in plain sight near the ticket vending machines right outside the gates at the station’s Marunouchi South Entrance.
▼ Can you see it?
Inlaid in the floor tiles is an unusual symbol, with a white hexagon inside a black circle. Most people don’t even realize it’s there, and those that do probably figure it’s some sort of marking for maintenance workers. Who it’s really of interest to, though, is historians, because the symbol marks the exact spot where one of Japan’s most shocking political assassinations took place.
The first half of the 20th century was an especially volatile time in Japanese politics, as industrialists and military leaders jockeyed to fill the power gap caused by the dismantling of the shogunate at the end of the Meiji Restoration. With Japan’s isolationist policy revoked and the common people removed from their status as subservient peasants, there was intense debate as to what direction the country should take in this new, wide-open era, and plotting a course that would please everyone was an impossible task for any politician, including Prime Minister Hara Takashi, who took office in 1918.
When Hara was at Tokyo Station on November 4, 1921 to board a train for Kyoto, a rail worker with right-wing political affiliations chose to express his disapproval for Hara’s conduct, with his belief that the prime minister was in the pocket of business conglomerates and his distaste for the politician’s push for universal suffrage among his grievances. He chose to communicate his displeasure by stabbing Hara with a knife in the right side of his chest, killing him almost instantly.
Moving on to the area inside Tokyo Station’s regular ticket gates, if you head towards the gates for the Shinkansen using the building’s Central Passage you’ll come to a short flight of stairs.
Once again, if you look down you’ll see a marking on the floor. This one is larger, making it look even more like some sort of maintenance hatch, maybe one designed by ninja taking a page from the Pokémon manhole cover playbook by decorating it with a throwing star pattern.
Actually, though, this is another place in Tokyo Station where someone wanted to kill the prime minister of Japan. This time the target was Hamaguchi Osachi, who began his term in 1929. Hamaguchi was also attacked by a right-wing assassin, following anger from the political faction over his unsuccessful economic policies and attempts to limit military expansionism.
Despite the shuriken-like motif on the floor marking, the assassin used a pistol, shooting Hamaguchi on November 14, 1930, while he was at Tokyo Station to board a train for Okayama Prefecture. A doctor was able to perform first aid and Hamaguchi was rushed to the hospital of Tokyo Imperial University (the present-day University of Tokyo) where an emergency surgery kept him alive, but he never fully recovered and died from lingering complications related to his injury the following year.
Both memorial markers are accompanied by Japanese-language plaques on the wall explaining their meanings, but their nondescript appearance means that few, if any, of the people hurrying to their train register that the signs are there, let alone stop to read them.
▼ The explanation plaque near the Hara assassination site (the arrow was added to the photo by us, and isn’t part of the actual station interior)
For those that do understand their significance, though, they’re a reminder of just how much history Tokyo Station has, and how fortunate Tokyoites are to be living in a much more stable society than their counterparts from less than a hundred years ago.
Meanwhile, if you like your Japanese rail secrets a little less blood-soaked, there’s always the Tokyo train station with the hidden kitty cats.
Photos ©SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]










Fossil of an extinct crab discovered in a pillar at Tokyo Station
Navigate your way through Japan’s busiest train stations with Google Street View
We visit Tokyo Station…outside of Tokyo
Tokyo Station Waterscape Toilet looks more like an aquarium than a bathroom
Our reporter can’t resist mystery of always-shut door being open on Tokyo subway station platform
Studio Ghibli unveils new My Neighbour Totoro Yearly Plate for 2027
New Japanese convenience store rice balls taste like instant noodles [Taste test]
Kyoto temple bans visitors from wearing kimono
Lego PlayStation recreates Sony’s original console, makes unusual choice for games to salute
New Pokémon anniversary song is 22 minutes long, features all 1,025 Pokémon species [Video]
Starbucks Japan releases new coffee table book featuring 18 of the most unique stores around the country
Japan’s Tsukimi One-hand Bento’s name is all wrong, but it still looks entirely delicious
Japan’s revolving sushi restaurant king Sushiro coming to U.S. this fall with high prices, no tipping
American tourist in Japan arrested on charges of attempted murder and arson
Starbucks Japan reveals new Tsukimi Moon-Viewing drinkware and gifts for autumn 2026
Solo travel in Japan: Hidden beer garden in Tokyo is a haven for single visitors
Studio Ghibli unveils new anime calendars and diary planners for 2027
Family Mart releases new Human Made Cup Noodle in Japan, with freebies for Nigo fans
A real-world Pokémon Poké Ball hotel is opening in Japan at a still-secret location [Video]
Japan’s first fall color forecast for 2026 is here!
One Piece Day 2026 brings new art, music, and new cast announcements
Tamagotchi evolves into a ring for its 30th anniversary, preorders now open
Hobonichi unveils new 2027 planners, diaries and stationery with One Piece, Suica Penguin, Hello Kitty and a must-buy Mini Techo
12-year-old British girl who went missing in Tokyo found safe after visiting anime sites around Yokohama
7-year-old boy left behind on Mt. Fuji by his own dad
Japan’s final Penguin Suica train cards have already shipped, and when they’re gone, they’re gone
Sushi Bus: Japan’s first conveyor-belt bus lets you eat sushi while sightseeing around Tokyo
Japanese toilet aims to attract foreign tourists but not everybody is happy about it
New Japanese vending machine at Shinkansen station sells cups of ice on platform
Study finds hundreds of people in Indonesia legally named after Naruto, Inuyasha, other anime stars
Japan approves foreign resident visa renewal fee increases of up to 967 percent, starts soon
Japan tripled its departure tax to fund tourism but is using the money on cherry blossoms and bears
Japan announces sudden 400-percent increase in visa fees for foreigners entering the country
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Studio Ghibli has a new anime out, and there’s only one place in the world where you can see it
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Tokyo subway installing new ticket gates that don’t accept payment through Suica or other IC cards
Japanese ninja certification exam attracts 131 candidates from Japan and abroad
Salomon releases Japan-exclusive Mt. Fuji hiking gear that doubles as an amazing souvenir
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
The Japanese train station famous for mysterious dancing cats
Taste the floor of a Japanese train station with new limited-edition chocolates from Tokyo Metro
Tokyo station becomes first in the city to install an inclined elevator
Get your cakes in about a minute with Tokyo Station’s unmanned Tokyo Banana shop
Video shows final moment for Harajuku Station as Tokyo landmark closes after 96 years in service
Tokyo Station lists departing train’s destination as…New York?!
Secret stairs at Tokyo Station dungeon come with a serious warning
Tokyo farewells Japan’s only double-decker Shinkansen with a special escalator at the station
Skynet sends a Terminator to Tokyo’s Shinjuku Station to future-freak-out commuters【Photos】
Station lockers around Tokyo start closing from today due to upcoming Trump visit to Japan
What’s up with the secret basement at this Japanese train station?
There’s a shrine and strange scene waiting for you at the top of this Japanese train station
Japan’s “station closest to the sea” lives up to its name【Photos】
The golden escalator hidden at a Tokyo train station