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The story
The lineup is complete for candidate sites to host part of Japan’s “sub-capital” functions: Osaka, Nagoya, Fukuoka, Sapporo, and Sendai — and it’s stirring up discussion.
On 5ch, opinions split over the candidates based on Nankai Trough earthquake risk, fiscal strength, and proximity to the continent, with some users pushing for Sendai or Hiroshima instead.
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Source: x.com / Original post here
What people said
Earthquakes can hit anywhere, though
The gap with the No. 1 city (Tokyo) is way too huge
Too far from Tokyo
You need some level of coordination with Tokyo
Runner-up would be Fukuoka or Sapporo, under the banner of regional revitalization
Osaka and Nagoya are a no
Fukuoka ← too close to the continent
Sapporo ← winters are scary
Guess it's Sendai
Osaka's already thriving enough
Osaka's finances are garbage
That leaves Nagoya and Sendai — both carry earthquake risk, but given its finances and central location in Japan, Nagoya works fine, doesn't it
What are you even looking at to call Osaka's finances garbage?
They've improved massively
Just carp swarming over bait
Fukuoka ← too close to the continent
Sapporo ← winters are scary
Sendai or Hiroshima, maybe
Why make a place that'll die with us in the Nankai Trough quake into the sub-capital?
Building it on the front line against Russia is insane
Awkward to say at first, but you'd get used to it eventually
Fukuoka should just rename itself Dazaifu
Make each one a regional outpost suited to that area's own characteristics
Better to spread out the capital functions, yeah
Sounds like you've got an inferiority complex and some jealousy toward Osaka lol
Yeah, it really is nothing but vacant lots
The old Sakuranoya, EDEN, and the AEON that used to be in the Yomiuri Building
They're leaving that part vague, so of course no answer's coming
Background and Key Points
Japan doesn’t have a formal secondary capital — the “sub-capital” (副首都) concept is a policy response to fears that Tokyo, which houses the Diet, the imperial residence, and most corporate headquarters in one metro area, could see the entire national government crippled by a single disaster. The trigger is the Nankai Trough megathrust earthquake, which the government’s own seismology panel puts at roughly 70-80% likelihood within the next 30 years, with damage estimates in the hundreds of thousands of lives and over ¥200 trillion in economic loss along the Pacific coastal belt stretching from Shizuoka through Osaka and into Kyushu. A sub-capital law was floated in the Diet to designate a backup city that could house government functions if Tokyo were paralyzed, and Osaka, Nagoya, Fukuoka, Sapporo, and Sendai are the five cities that formally put themselves forward.
The thread’s actual fault line isn’t whether a sub-capital is needed, it’s which risk should be weighted more heavily. Posters pit Nankai Trough exposure (ruling out Osaka and Nagoya) against distance from Tokyo (ruling out Sapporo and Fukuoka) against fiscal capacity and proximity to “hostile” neighboring countries (used against Fukuoka and Hokkaido). No candidate clears all three filters, which is why the thread drifts toward write-in alternatives like Sendai or Hiroshima rather than converging on the official five.
What’s missing from the discussion is that nobody defines what “sub-capital” would actually do — post 83 flags this directly. The law under discussion is largely about administrative continuity and disaster-response coordination, not relocating the Diet or ministries wholesale, a distinction easy for outside readers to miss given how loosely the term is being used.
*This article is excerpted and summarized from the 5ch (Nandemo Jikkyo G) thread “[Image] The 5 candidate cities for sub-capital are all in. Which one’s best???.”
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