Japan Passes Second Capital Law as Regions Compete to Back Up Tokyo in Emergencies

A backup seat of government, with a decision due within a year

Japan has passed legislation allowing one or more regions to become a temporary second capital if a major disaster or another national emergency disables Tokyo. The law calls for a designation within about one year after it takes effect, opening a contest among Osaka and other regions to host essential national institutions during a crisis.

Prime Minister Sanae Takaichi will oversee the selection. A government headquarters is expected to be established, with a minister assigned to manage the initiative. The aim is to keep the prime minister's office, parliament, ministries and other essential institutions working when the capital becomes inaccessible.

Tokyo remains Japan's capital. Ministries and companies are not required to move immediately. The legislation creates a framework for choosing a prefecture with enough people, economic strength, infrastructure and administrative capacity to take on national responsibilities when needed.

The measure passed at the end of an extended Diet session after weeks of political conflict. Its margin of victory in the opposition controlled House of Councillors was just two votes. That narrow result delivered a major commitment in the agreement between Takaichi's Liberal Democratic Party and the Japan Innovation Party, while showing how difficult other coalition proposals may be to pass.

As of July 30, 2026, Japan has established the legal basis for an emergency alternative to Tokyo. Choosing the regions, deciding which functions they would receive and preparing them to operate during a disaster are the next tasks.

Why a disaster in Tokyo could become a national crisis

Government estimates put the chance of a magnitude 7 class earthquake striking the Tokyo metropolitan area at roughly 70 percent within the next 30 years. Japan is among the world's countries most exposed to earthquakes, and Tokyo lies in an area facing major seismic risk.

A quake of that scale could damage roads, railways, power networks, communications systems and government buildings across a wide area. Officials trying to coordinate rescue work could face disrupted transport and communications at the same time that residents need urgent assistance.

Tokyo accounts for about one fifth of Japan's economic output, contains more than half of the country's listed companies and is home to around 30 percent of the national population. Banks, financial markets and corporate headquarters could also be disrupted, carrying the effects of a disaster far beyond the capital.

Officials have cited typhoons and other events as possible reasons to activate the system. The purpose is to preserve the government's ability to make decisions, distribute resources and coordinate rescue and recovery, even if Tokyo cannot function for days or weeks.

Government continuity means keeping those essential tasks running despite the loss of the usual workplaces. A designated region would need prepared offices, secure communications, transport connections, accommodation and procedures for receiving officials. Agreements between prefectural and city governments would also be needed so that authority could be transferred quickly.

How a region would qualify

The prime minister will make the final selection from prefectures that submit nominations. A candidate must face a lower chance of severe damage from the same disaster affecting the Tokyo area. It must also have the population, economic strength and public administration capacity necessary to support national functions.

The law allows more than one region to receive the designation. Several backup centers could distribute emergency responsibilities rather than placing every replacement function in one city. Spreading those responsibilities may reduce the risk of one disaster disabling the entire backup system.

Candidate areas are expected to demonstrate that they can coordinate government work through special administrative wards or formal agreements between a prefectural government and a major city. The requirement makes cooperation between levels of local government part of the selection process.

The arrangements remain incomplete. The government still has to decide which ministries or agencies would work outside Tokyo, how officials would travel, how records would be protected and how authority would move during an emergency. A region's ability to receive national institutions will depend on those practical preparations as well as its size and wealth.

Selected regions could receive tax benefits, regulatory changes and public investment in government buildings, transport and other infrastructure. Supporters argue that this assistance would improve emergency readiness and give regional economies new sources of growth.

Why Osaka is at the center of the debate

Osaka is the most politically prominent contender because it is the base of the Japan Innovation Party, known in Japan as Ishin. The party has promoted a second capital for years. Its founder, former Osaka governor Toru Hashimoto, began advocating the proposal around 2010.

The second capital bill became part of the coalition agreement between Takaichi's LDP and Ishin. That agreement helped bring Ishin into government after the LDP ended its long partnership with Komeito. Passing the legislation was one of the main commitments that secured Ishin's support for Takaichi's administration.

Osaka's campaign is connected to Ishin's separate Osaka Metropolis Plan. That proposal would abolish Osaka City and replace it with several special wards, using an administrative structure modeled partly on Tokyo. Supporters say the change would reduce overlapping responsibilities between the city and prefectural authorities.

Voters narrowly rejected the metropolis plan in referendums in 2015 and 2020. Osaka Governor Hirofumi Yoshimura, who also leads Ishin, is seeking another referendum next spring. The second capital law may give that campaign fresh momentum because administrative coordination is part of the new selection framework.

Yoshimura said after the bill passed that the government should designate several regions, presenting the proposal as a way to support national growth as well as emergency operations.

More than one area should be designated as a second capital. Such core areas will drive Japan's growth.

Opposition parties argue that the law was designed to reward Ishin rather than meet civil protection needs. They point to its close connection with the coalition agreement and the absence of a detailed cost estimate. Critics fear Osaka could receive a disproportionate share of public money, tax relief and infrastructure projects.

Other regions prepare competing bids

The legislation does not name Osaka as the future backup capital. Other regions are therefore preparing to compete, presenting their own combinations of infrastructure, economic capacity and disaster resilience.

Fukuoka's prefectural government is preparing a joint bid with Fukuoka and Kitakyushu. Governor Seitaro Hattori said the region would work with municipalities and the local business community as one Fukuoka team. The prefecture is considering an agreement linking its government with both cities, rather than depending on one city alone.

Aichi Governor Hideaki Omura said Aichi and Nagoya already have the functions needed to serve as a second capital. The prefecture is home to major manufacturing industries, including Toyota's headquarters and supply networks. Its case rests on the existing strength of Nagoya's institutions and its industrial base.

Hokkaido Governor Naomichi Suzuki said officials were holding talks with Sapporo and would begin concrete discussions after enactment of the law. Sapporo's distance from Tokyo could help it avoid some disaster risks shared with the capital area, making geographic separation an important part of its case.

Miyagi Governor Yoshihiro Murai said the prefecture would apply if it could meet the legal requirements. Hiroshima and other areas have also shown interest, while Fukuoka, Sapporo, Nagoya and other major cities consider how to build formal bids.

The contenders are proposing different forms of regional cooperation. Fukuoka is considering a structure involving two cities and the prefecture. Aichi is pointing to institutions and industry already in place. Hokkaido is stressing its distance from Tokyo. Each approach will have to meet the government's detailed standards.

Emergency readiness also becomes a contest for investment

A second capital designation could bring public offices, better transport connections, new data systems and private sector investment. It could also give a region a stronger voice in national politics. The selection may consequently become a contest over national investment as much as emergency planning.

Supporters see the project as a way to reduce Tokyo's dominance while improving disaster preparedness. The concentration of people, companies and public institutions in the capital has long drawn criticism for pulling talent and investment away from other parts of Japan.

Giving several regions stronger national roles could spread economic activity and create additional centers of decision making. Yoshimura's call for more than one second capital reflects that wider ambition, while the law's allowance for multiple designations makes it possible to distribute responsibilities.

The same choice creates a practical tradeoff. Several locations may reduce the risk of losing all emergency facilities at once, but the government would have more institutions and communications routes to coordinate. The eventual allocation of functions will determine how much responsibility each selected region actually receives.

The cost is still unknown

The government has yet to publish a full cost estimate. Offices for ministries, expanded secure communications and transport improvements could require substantial spending. Tax incentives would reduce public revenue, while regulatory changes would shift rules in favor of selected areas.

Critics question whether those benefits would justify the expense as Japan faces rising social security costs, a shrinking population and pressure on household budgets. They also warn that the second capital label could create unrealistic expectations if a selected region receives a title but few actual government functions.

Tokyo Governor Yuriko Koike has supported stronger disaster backup arrangements while rejecting the argument that the capital's concentration is itself the central problem. Tokyo has invested in emergency facilities, including a disaster preparedness center in Tachikawa, in the western part of the metropolitan area.

The national initiative will need to work alongside Tokyo's own response system. Preparing an alternative outside the capital and maintaining emergency capacity within Tokyo are both parts of keeping public institutions operating when normal arrangements fail.

Concentrating emergency facilities in a new location would create another vulnerability. A successful system would require several layers of backup, including remote data centers, alternative communications routes and arrangements for officials to work from different parts of the country.

A narrow parliamentary victory for Takaichi

Takaichi secured passage after a difficult parliamentary process that exposed divisions inside and outside the ruling bloc. Opposition lawmakers boycotted proceedings during the dispute. The government extended the Diet session by eight days, and the final vote came only after procedural concessions.

The LDP and Ishin control the more powerful House of Representatives, where the ruling coalition won a large majority in February. The opposition controls the House of Councillors, making negotiations necessary for legislation to pass. The two vote margin on the second capital bill illustrates that constraint.

The government prioritized the measure after setting aside a separate plan to reduce the number of proportional representation seats in the lower house. Those seats are allocated through a voting system intended to reflect parties' shares of support, rather than simply choosing a winner in each local constituency.

Takaichi later said she would continue working to fulfill the coalition agreement and that trust between the LDP and Ishin would remain firm. The prime minister stated her intention to pursue the governing parties' commitments.

I will press ahead toward the realization of the ruling coalition agreement.

The same session approved changes to the law governing constitutional amendment referendums. The revision is viewed as groundwork for the LDP's longstanding goal of revising Japan's pacifist Constitution, which took effect in 1947. That broader agenda has added to the political tensions surrounding the government.

The milestones behind the new law

The second capital proposal brings together a campaign that began years ago, Osaka's repeated debates over local government reform and the more recent agreement that brought Ishin into national government. The main milestones show how those issues converged.

• 1947: Japan's pacifist Constitution took effect. Changes to constitutional referendum law were approved in the same parliamentary session as the second capital measure.
• Around 2010: Former Osaka governor and Ishin founder Toru Hashimoto began advocating a second capital.
• 2015: Osaka voters narrowly rejected the Osaka Metropolis Plan in a referendum.
• 2020: Voters narrowly rejected the metropolis plan again.
• February: The LDP and Ishin won a large majority in the House of Representatives.
• By July 30, 2026: The second capital legislation had passed after an eight day extension of the Diet session, with a two vote margin in the House of Councillors.
• Within about one year after the law takes effect: The legislation calls for the government to designate the backup region or regions.
• Next spring: Yoshimura is seeking another referendum on the Osaka Metropolis Plan.

The law now gives regional governments a route to submit nominations. Osaka's prominence comes from Ishin's political campaign and coalition role, while the final selection remains open to prefectures that meet the requirements.

What the government must prepare next

The next stage is to establish detailed application standards and assess competing regions. The headquarters overseen by the prime minister will have to compare disaster exposure, government facilities, transport capacity, population, economic scale and administrative arrangements.

Preparing a region to run national operations requires more than selecting a location. The government will need plans for moving parliament, cabinet offices, courts, records, communications and financial operations. Exercises will also be needed to test whether national authorities can shift work quickly while Tokyo is damaged or cut off.

The selection could become politically difficult if several regions meet the formal requirements. Choosing Osaka could satisfy Ishin while renewing accusations of favoritism. Choosing several regions could spread resources and reduce that criticism, although it would make coordination more complex.

Published criteria and cost estimates will be central to public confidence. Japan has begun the process of creating an emergency seat of government, while Tokyo remains the capital and Osaka and its rivals compete for responsibilities that could bring both disaster duties and lasting economic influence.

Key Points

• Japan has passed a law allowing one or more regions to host essential national government functions temporarily during a major disaster or another emergency affecting Tokyo.
• Tokyo remains the capital, and ministries and companies are not required to relocate immediately.
• The government estimates a roughly 70 percent chance of a magnitude 7 class earthquake in the Tokyo metropolitan area within 30 years.
• Takaichi will oversee selection, with a designation called for within about one year after the law takes effect.
• Osaka, Fukuoka, Aichi, Hokkaido, Miyagi, Hiroshima and other areas have shown interest.
• The measure passed the House of Councillors by two votes after an eight day extension of the Diet session.
• Detailed operating arrangements and a full cost estimate are still needed.