Why Does Japan Want Captives at Home Now?

Japanese companies already use captives overseas. Japan’s proposed domestic regime is therefore less about introducing a new risk-financing tool than asking why that capability should now sit inside Japan’s own insurance architecture.

Japan is considering creating a domestic regime for reinsurance captives. At first glance, that sounds like the introduction of a new insurance mechanism. It is not.

Japanese companies have been establishing captives overseas for years, particularly in jurisdictions such as Hawaii. Japan’s Financial Services Agency cites industry estimates ranging from around 100 Japanese corporate captives to more than 160. A 2025 survey presented by the FSA found that 37% of 147 responding companies had either established a captive or considered doing so. Among companies with annual sales of at least ¥500 billion, the proportion was 64%¹.

So the interesting question is not why Japanese companies should be allowed to use captives. They already do.

The more consequential question is:

Why does Japan now want them at home?

Japan already has captives — just mostly offshore

A captive is an insurance company established primarily to assume the risks of its parent company or corporate group. Japan currently has no regulatory category designed specifically for that purpose. A company seeking to operate a reinsurance captive domestically would generally need to fit within the ordinary insurance-company framework, even if it only assumes risks originating within its own corporate group¹.

That helps explain why Japanese groups have established captives abroad instead. The structure usually still involves a conventional insurer. A Japanese operating company buys insurance from a primary insurer, which then cedes an agreed portion of the risk to the group’s captive. The captive can retain that exposure or transfer part of it into the global reinsurance market¹.

The captive therefore does not simply replace the insurer. It changes who ultimately retains part of the risk — and who decides what should remain inside the corporate group and what should be transferred externally.

Eveil View

Japan is not introducing captives because Japanese companies lack access to them. The more significant change is that policymakers are considering whether a risk-financing capability already used offshore should become part of Japan’s domestic insurance architecture.

Why bring that structure back to Japan now?

Japan’s 2026 Growth Strategy gives one direct answer. It notes that Japanese companies are increasingly establishing captives overseas, while some want a domestic option because of foreign-exchange exposure and the risk of changes in overseas regulatory regimes. The government therefore plans to consider legislation for a specialised reinsurance-captive regime, with a bill targeted for submission to the next ordinary Diet session¹.

But that alone does not explain why the issue has become more important now. The changing economics of corporate insurance matter.

An FSA survey presented on 1 October found that, among 74 companies reporting insufficient insurance capacity, 96% said the situation had either worsened or failed to improve from the previous year. Separately, 54% of companies reporting premium increases described those increases as relatively serious¹.

That creates a different risk-management question. A captive does not create additional capacity by itself. But it allows a company to ask:

Which risks should we transfer — and which can we afford to retain ourselves?

That is a substantially different question from simply asking which insurer offers the best terms.

Mitsubishi Heavy Industries shows what this looks like in practice

Mitsubishi Heavy Industries provides a useful example. MHI told the Insurance System Working Group that liability-insurance capacity had become progressively tighter. After increasing the amount of risk it retained directly, the company established a reinsurance captive in Hawaii in April 2026⁴.

Its rationale went beyond insurance cost. MHI wanted to maintain access to insurance certificates required for business transactions, consolidate insurance-loss information across the group, and avoid fragmented insurance arrangements being made independently by individual businesses⁴.

It also described its insurance programme as a “risk sensor”: information from claims, risk surveys, insurance markets and underwriting outcomes is fed back into business risk management and management decision-making⁴. That is closer to an operating model for corporate risk than a mechanism for buying cheaper insurance.

MHI also pointed to the drawbacks of maintaining an overseas captive, including exposure to changes in local regulation and taxation, foreign-exchange movements and rising maintenance costs⁴. That makes the domestic-policy question more concrete.

Japan is not trying to persuade companies such as MHI that captives exist. It is asking whether companies that already see a business case for them should have to locate that capability overseas.

The regulatory calculation has changed

Japan has considered captives before. In the early 2000s, Nago City in Okinawa proposed permitting reinsurance captives as part of its financial special-zone initiative. The FSA rejected that particular proposal in 2004, principally because of prudential concerns. A lightly regulated captive could fail to meet reinsurance obligations, potentially affecting the solvency of the primary insurer and, ultimately, policyholders¹.

The current debate is therefore not the first time Japan has examined the idea. What appears to have changed is the regulatory question.

Twenty years ago, the concern was whether a lighter captive regime could weaken prudential protection. Today, the government is asking whether a proportionate regime can preserve those protections while allowing companies greater flexibility over how they finance risk.

The current proposal is also deliberately narrower. The FSA is initially focused on reinsurance captives, where a licensed primary insurer remains between the corporate policyholder and the captive, rather than immediately creating a broader direct-writing captive regime¹.

Eveil View

The captive concept itself is not new. What has changed is the policy context: tighter corporate insurance capacity, greater use of overseas captives by Japanese groups, and a stronger emphasis on companies taking deliberate ownership of how risk is retained and transferred.

A captive does not solve the capacity problem

There is an important limit to the reform. Moving risk into a captive does not make the risk disappear.

If the company retains risk inside its captive and cannot obtain adequate reinsurance, the economic exposure remains within the corporate group. The FSA’s earlier corporate risk-management discussions recorded that, for some Japanese companies, insufficient underwriting information or loss-prevention measures can make reinsurance difficult to obtain even where a captive exists, leaving risk in the captive³.

That means better risk management becomes more important, not less. Companies need to understand their exposures, determine how much loss they can absorb, price retained risk appropriately, and decide where external insurance or reinsurance produces economic value.

They also need the governance and expertise to make those decisions. The broader FSA-METI review positions captive use as one element of integrated risk financing rather than an end in itself².

A domestic captive regime can provide another vehicle for managing risk. It cannot substitute for the underlying capability.

What remains uncertain

A domestic captive regime does not itself create insurance capacity, improve risk data or make companies better at pricing retained risk. Its impact will depend on the eventual regulatory design — and on whether companies have the governance, expertise and financial capacity to use the structure well.

Insurers and brokers may not become less important — but their roles could change

If Japanese companies become more deliberate about retaining risk, the role of commercial insurance does not necessarily diminish. It may change.

A primary insurer can still provide underwriting expertise, claims services, risk engineering, local policy issuance and access to external capacity. What changes is the assumption that the insurer should automatically retain most of the insurable risk placed with it. A broker’s role could similarly move further upstream — from finding capacity and negotiating premium toward helping companies decide how much risk to retain, how to structure the captive layer and where to access global insurance and reinsurance markets.

For global reinsurers and specialist insurers, a more sophisticated corporate risk market could create different routes into Japanese risk. These remain potential consequences rather than established outcomes. Much will depend on the rules ultimately adopted and on how companies use them.

The deeper shift is from buying insurance to allocating risk

Japan’s proposed captive regime could easily be viewed as a technical insurance-law reform. That would miss the larger point. A captive makes the economics of risk retention more explicit. The company must decide which losses it is prepared to finance itself, which exposures should be transferred to an insurer, and which should ultimately reach the global reinsurance market.

That is not simply insurance purchasing. It is capital allocation. And that may explain why Japan wants captives at home now.

The reform is not primarily about introducing Japanese companies to a structure they have never used. It is about bringing an existing offshore practice into Japan at a moment when corporate insurance capacity is under pressure and policymakers want companies themselves to take greater ownership of risk management¹².

The meaningful test will therefore not be how many captives Japan licenses. It will be whether Japanese companies become better at deciding which risks they should retain, which they should transfer, and why.