Secondary Capital Plan: Hiroshima Misses the Population Cut, Governor Yokota to Press Tokyo for Answers

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The story

The government’s proposed criteria for designating a “secondary capital” call for a city with at least 1.2% of the national population and an economy worth at least 2.1% of GDP — and it turns out Hiroshima Prefecture falls short on the population requirement. Governor Yokota says he plans to ask the national government why these particular criteria were set. The secondary capital concept is meant to provide a backup for capital functions in the event of a major disaster, and on 5ch, opinions split between those arguing that low disaster risk should matter more than population size, and those insisting a certain population and economic scale is needed to keep government functions running — with the debate spreading to candidate cities ranging from Osaka, Nagoya, and Sapporo to Okinawa and Nagano.

The government has published the criteria for designating a “secondary capital” — a city that would take over capital functions in the event of a major disaster — and it has emerged that Hiroshima Prefecture does not meet the population requirement.

Governor Yokota plans to ask the national government why the criteria were set as they are.

Under the draft government ordinance, the criteria for designating a “secondary capital” include having a city that accounts for at least 1.2% of the national population and an economy equivalent to at least 2.1% of GDP.

Source: news.yahoo.co.jp / Original article here

What people said

3AnonymousOct 4, 2026 21:05
That 1.2% figure feels kind of nasty, honestly
it looks deliberately set just high enough to knock Hiroshima out.
10AnonymousOct 4, 2026 21:07
Re: #3
Please, no — making a radiation-contaminated area the secondary capital? Hard pass.
93AnonymousOct 4, 2026 21:31
Re: #10
If we're going by that logic, Fukushima, Ibaraki, and Chiba would all be out too.
7AnonymousOct 4, 2026 21:06
Just relocate the capital already.
At the very least the ministries and the Diet could move.
Fukushima's Hamadori region would be fine.
97AnonymousOct 4, 2026 21:31
Re: #7
Capital relocations based on population often don't work out well — that's been a headache since ancient Japan and every shogunate in history.
169AnonymousOct 4, 2026 22:04
Re: #7
Not Fukushima, but before 3/11, Sendai was the leading candidate for a relocated capital.
If Osaka ends up being chosen as the secondary capital, I bet that once the scars of the Tohoku earthquake have healed, the anti-Osaka crowd who aren't happy about it will push to move the capital to Sendai instead, reducing the secondary capital (Osaka, etc.) to a hollow title.
226AnonymousOct 4, 2026 22:23
Re: #7
Forcibly moving the capital to a low-population area would just end in failure, like Indonesia.
8AnonymousOct 4, 2026 21:07
Honestly, Sapporo or Fukuoka would be fine.
16AnonymousOct 4, 2026 21:10
Re: #8
Realistically, in terms of population, GDP, and global name recognition, it's got to be Osaka.
46AnonymousOct 4, 2026 21:19
We don't need any of this — just introduce a regional states system (dōshūsei, a proposal to replace prefectures with larger US/German-style states) already.
54AnonymousOct 4, 2026 21:21
Re: #46
Exactly this — and cut the number of "senile lawmakers" (a slur pun on *chihō giin*, "local assembly members") down to a tenth.
There are 32,000 of these clowns. 32,000 enemies.
73AnonymousOct 4, 2026 21:25
Re: #46
That's exactly what Ishin no Kai (the Osaka-based Japan Innovation Party) is aiming for, but if it were that easy there'd be no struggle.
Even in their home turf of Osaka they couldn't pull it off (the Osaka Metropolis Plan).
Most citizens probably haven't even thought hard about why it matters.
48AnonymousOct 4, 2026 21:20
Without a population in the 2-million range, a city just can't hold up as a secondary capital.
94AnonymousOct 4, 2026 21:31
Re: #48
Then it's got to be Osaka, Nagoya, or Sapporo.
Yokohama's too close to Tokyo — in a natural disaster or emergency it would likely go down right along with Tokyo.
103AnonymousOct 4, 2026 21:35
Re: #94
In the end this is just a temporary setup until recovery from a Fuji eruption or major earthquake, right?
Kyushu or Hokkaido are too far away — travel back and forth would be a pain.
Why not pick several places like Osaka, Nagoya, and Sendai and just rank them by priority?

Just one feels too risky.
155AnonymousOct 4, 2026 21:57
Re: #103
We need somewhere with wide-open land and a food-production base — Sapporo, or Hokkaido in general, can't be left out.
167AnonymousOct 4, 2026 22:04
Re: #103
Too close to Tokyo and there's a risk both go down together.

For things like a disaster-recovery computer center, Hokkaido or Kyushu would be preferable.
108AnonymousOct 4, 2026 21:37
If anything, a big population is just dead weight.
South Korea, for instance, recently moved its capital from Seoul to some little rural town with nothing there — though Japanese media never reports on it.
116AnonymousOct 4, 2026 21:42
Re: #108
The relocation of the capital to Sejong City isn't set to be complete until 2033.
123AnonymousOct 4, 2026 21:46
The population requirement makes no sense at all.
Better to move it to somewhere with a smaller population than an overcrowded area like Osaka.
131AnonymousOct 4, 2026 21:47
Re: #123
I get that — if anything, a moderately low-population spot sounds better.
145AnonymousOct 4, 2026 21:54
Re: #123
It's not like there's a ton of open land there either.
139AnonymousOct 4, 2026 21:51
If it's Hiroshima, somewhere like Higashi-Hiroshima would actually be just right.
It's got an airport nearby, and unlike central Hiroshima it's not saturated with development, so there's plenty of room to build new facilities.
And best of all, it sits up on a plateau, so tsunami damage simply isn't possible.
151AnonymousOct 4, 2026 21:56
Re: #139
That's way too low a population though — the infrastructure's there, but it's actually Hiroshima itself that has open land up around the north side of the station.
157AnonymousOct 4, 2026 22:00
Re: #151
Does population even matter for maintaining the national government's administrative functions in the first place?
It's not like you're building a factory — you don't need that many people.
161AnonymousOct 4, 2026 22:02
Re: #157
The secondary capital is meant to eventually become a regional capital — the question is whether Hiroshima's tax revenue could actually maintain the roads and bridges of Shikoku and the San'in region.
165AnonymousOct 4, 2026 22:02
Re: #157
The current capital has such a huge population that the bureaucrats probably just don't want to be stuck somewhere rural.
175AnonymousOct 4, 2026 22:07
Somewhere like Nagano or Yamanashi would be fine, and plenty of people actually agree.
Also, hardly anyone online pushes for Kyoto, yet the Kyoto Prefectural Assembly basically went out of its way to announce "we're not running" — self-own PR, lol.
180AnonymousOct 4, 2026 22:09
Re: #175
Realistically it'd have to be somewhere in the Pacific coastal belt.
184AnonymousOct 4, 2026 22:09
Re: #175
The whole point is to place the secondary capital somewhere free from the risk of a Tokyo-area earthquake or a Mt. Fuji eruption — so all of Kanto, plus Yamanashi and Shizuoka, are out of the question from the start.
186AnonymousOct 4, 2026 22:10
Re: #180
And a Nankai earthquake would hit the Pacific coastal belt hard too.
191AnonymousOct 4, 2026 22:12
Re: #186
Nagano or Yamanashi would be a three-hour trip each way.
196AnonymousOct 4, 2026 22:14
Re: #191
If convenience is the priority, northern Kanto would work fine — places like Gunma or the Nasu area wouldn't get hit by a massive quake at the same time as central Tokyo.
200AnonymousOct 4, 2026 22:15
Re: #196
I don't really get the point of northern Kanto — it's too rural.
210AnonymousOct 4, 2026 22:18
Re: #196
Apparently during the Great Kanto Earthquake, the municipalities surrounding Kanto were completely overwhelmed just dealing with refugees from the disaster zone.
The population's only grown since then, so wouldn't disaster response need to take priority over serving as a capital-function backup?

Also, if Mt. Fuji erupts, depending on wind direction the affected area could be pretty severe.

Background and key points of this discussion

The government’s proposed criteria for designating a “secondary capital” set numerical thresholds — at least 1.2% of the national population and at least 2.1% of GDP — reflecting a plan to designate, in advance, a backup location to take over if a Nankai Trough or Tokyo-area earthquake knocks out central government functions. Hiroshima Prefecture falls short of the population requirement, and Governor Yokota plans to ask the national government to explain the basis for the criteria themselves. What split the thread was disagreement with the underlying premise that a large population is even necessary — one camp argued that a less-populated area would actually be easier to build new government facilities in and carries lower disaster risk, while the other insisted a certain economic base is needed to support national administrative functions. Candidates ranged from major metro areas like Osaka, Nagoya, and Sapporo to Hiroshima, Higashi-Hiroshima, Okinawa, and Nagano — and readers may easily conflate this with an outright capital relocation, when the distinction (a disaster-time backup rather than a permanent move) wasn’t always made clear in the discussion. Comparisons were drawn to South Korea’s relocation to Sejong City, but details like the completion date were just one poster’s claim in the thread, not verified information.

※This article is excerpted and summarized from the 5ch (News Soku+) thread “Secondary Capital Plan: Hiroshima Misses the Population Cut, Governor Yokota to Press Tokyo for Answers“.

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