A Practical Guide to Property Insurance, Earthquake Coverage and Insurance Brokers for Real Estate Investors in Japan
Introduction
Insurance is an important but sometimes overlooked part of commercial real estate investment in Japan.
An investor may spend considerable time analyzing:
- Purchase price
- NOI
- Cap rate
- Financing
- Legal structure
- Technical condition
But after acquiring the property, the investor also needs to consider:
What happens if something goes wrong?
Potential risks include:
- Fire
- Earthquake
- Typhoon
- Flood
- Water damage
- Equipment failure
- Business interruption
- Third-party liability
- Construction accidents
- Cyber incidents
- Other unexpected events
Japan has a sophisticated insurance market that includes major domestic insurance groups as well as international insurers.
Large investors may also use an insurance broker to help structure coverage and approach insurers.
This guide introduces selected insurance companies and brokers relevant to commercial real estate investors in Japan.
It is not a ranking.
Insurance availability, coverage, exclusions, limits and pricing depend on the individual property and insurance market conditions.
Why Commercial Real Estate Investors Need Insurance
Consider a simplified investment.
Property Value
JPY 10 billion
Annual NOI
JPY 400 million
The investor may focus primarily on protecting the JPY 400 million of annual income.
But the underlying asset itself is worth JPY 10 billion.
A major physical event could potentially affect:
Building Value
Rental Income
Operating Costs
Liability
Financing
Insurance is therefore part of the broader risk-management framework surrounding the investment.
A simplified structure may look like:
Real Estate Investor
↓
Asset Manager
↓
Insurance Broker / Agent
↓
Insurance Company
↓
Property and Liability Coverage
Insurance Company vs. Insurance Broker
Foreign investors should understand the distinction.
Insurance Company
The insurance company underwrites the risk and issues the insurance policy.
Examples include major Japanese and international insurers.
Insurance Broker
An insurance broker generally acts as an intermediary between the client and insurance companies.
Depending on the engagement and applicable regulations, the broker may help the investor:
- Identify risks
- Design an insurance program
- Approach insurers
- Compare terms
- Negotiate coverage
- Coordinate multinational insurance programs
- Support claims processes
For a sophisticated institutional portfolio, the broker may therefore become an important adviser rather than simply a distributor of insurance.
Major Japanese Property and Casualty Insurers
Japan has several large domestic property and casualty insurance groups.
These insurers provide corporate insurance products that may be relevant to commercial property owners, developers and operating businesses.
Tokio Marine & Nichido Fire Insurance
Type: Major Japanese property and casualty insurer
Tokio Marine & Nichido is one of Japan’s largest non-life insurance companies and part of Tokio Marine Group.
The insurer serves a broad range of corporate clients and provides insurance solutions covering areas including:
- Property
- Liability
- Business interruption
- Construction
- Marine
- Casualty
- Other corporate risks
For commercial real estate investors, relevant coverage may depend on:
- Property type
- Ownership structure
- Tenant structure
- Natural catastrophe exposure
- Operating business
The group’s international network can also be relevant to overseas investors and multinational companies.
Relevant For:
- Commercial property
- Large corporate risks
- Institutional investors
- Construction
- Liability
- International programs
Official Website: Tokio Marine & Nichido
Mitsui Sumitomo Insurance
Type: Major Japanese property and casualty insurer
Mitsui Sumitomo Insurance, commonly known as MSI, is a major Japanese non-life insurer and part of MS&AD Insurance Group.
The company provides insurance for a wide range of corporate risks.
For real estate-related clients, relevant areas can include:
- Property damage
- Business interruption
- Liability
- Construction
- Natural catastrophe risk
- Corporate risk management
Its position within one of Japan’s largest insurance groups makes it an important participant in the corporate insurance market.
Relevant For:
- Institutional real estate
- Commercial property
- Corporate portfolios
- Construction
- Liability
- Large Japanese companies
Official Website: Mitsui Sumitomo Insurance
Sompo Japan Insurance
Type: Major Japanese property and casualty insurer
Sompo Japan is another major Japanese non-life insurance company.
Its corporate insurance capabilities cover a broad range of risks relevant to property owners and businesses.
Potential areas include:
- Property
- Business interruption
- Liability
- Construction
- Natural disasters
- Global corporate risks
Sompo also provides risk-management capabilities that can complement conventional insurance placement.
Relevant For:
- Commercial real estate
- Corporate property
- Business interruption
- Liability
- Construction
- Risk management
Official Website: Sompo Japan
Aioi Nissay Dowa Insurance
Type: Major Japanese property and casualty insurer
Aioi Nissay Dowa Insurance is part of MS&AD Insurance Group and is another major participant in Japan’s non-life insurance market.
The company serves both individuals and corporations and provides a broad range of insurance products.
For commercial property owners, the insurer may form part of the group of domestic insurers considered when arranging:
- Property insurance
- Liability coverage
- Corporate insurance
- Other risk-transfer solutions
Relevant For:
- Commercial property
- Corporate insurance
- Liability
- Domestic portfolios
Official Website: Aioi Nissay Dowa Insurance
Nisshin Fire & Marine Insurance
Type: Japanese property and casualty insurer
Nisshin Fire & Marine Insurance is part of Tokio Marine Group.
While smaller than Japan’s largest non-life insurers, it is another established participant in the Japanese property and casualty insurance market.
Its inclusion illustrates that property owners may have options beyond the largest insurers depending on:
- Property size
- Risk profile
- Required coverage
- Distribution channel
Official Website: Nisshin Fire & Marine Insurance
International Insurance Companies Active in Japan
Foreign investors may also encounter international insurers operating in Japan.
International insurers can be particularly relevant where the investor has:
- Global insurance programs
- Properties in multiple countries
- International risk-management requirements
- Overseas headquarters
- Specialized corporate risks
AIG General Insurance
Type: International property and casualty insurer
AIG has a longstanding presence in Japan and provides commercial insurance solutions to Japanese and international companies.
Its global insurance capabilities can be particularly relevant to:
- Multinational companies
- Foreign investors
- Large corporate risks
- Specialized insurance requirements
Relevant areas may include:
- Property
- Casualty
- Financial lines
- Marine
- Cyber
- Other corporate risks
Relevant For:
- Foreign investors
- Multinational companies
- Commercial property
- Global insurance programs
- Specialty risks
Official Website: AIG Japan
Chubb Insurance Japan
Type: International property and casualty insurer
Chubb operates a substantial commercial insurance business in Japan.
Its corporate property products include coverage for:
- Fire
- Lightning
- Explosion
- Wind
- Hail
- Snow
- Flood
- Electrical and mechanical accidents
Certain products can also incorporate business interruption-related protection.
Chubb also offers corporate earthquake-related coverage and liability products.
This makes the company particularly relevant when considering a broader property-risk program rather than simply conventional fire insurance.
Relevant For:
- Commercial property
- Foreign investors
- Corporate portfolios
- Earthquake risk
- Business interruption
- Liability
- Construction
Official Website: Chubb Japan
Zurich Insurance Company
Type: International insurer
Zurich has a significant presence in Japan and is part of a major global insurance group.
Its international platform can be relevant to multinational companies and investors seeking coordinated risk-management solutions across jurisdictions.
Relevant For:
- International companies
- Corporate insurance
- Global programs
- Cross-border risk management
Official Website: Zurich Japan
Allianz
Type: Global insurance group
Allianz is one of the world’s largest insurance groups and provides commercial insurance capabilities internationally.
For large institutional investors, global insurers can become relevant where Japanese property forms part of a broader multinational portfolio or insurance program.
Relevant For:
- Global investors
- Large corporate risks
- International insurance programs
- Specialty risks
Official Website: Allianz
Starr Insurance
Type: International commercial insurer
Starr operates in Japan and specializes in commercial insurance.
Its international corporate insurance capabilities can be relevant to companies and investors with specialized or cross-border risks.
Relevant For:
- Commercial insurance
- International companies
- Specialty risks
- Cross-border programs
Official Website: Starr Insurance
Other Insurance Markets
Large or complex institutional property portfolios may involve additional insurance capacity.
Depending on the transaction, insurance programs can involve:
- Multiple insurers
- Co-insurance
- Reinsurance
- International insurance markets
The insurance structure for a JPY 100 billion portfolio can therefore look very different from the insurance structure for a single small investment property.
Major Commercial Insurance Brokers in Japan
Large institutional investors may choose to work with an insurance broker.
The broker can help connect the investor with appropriate insurance markets and structure coverage around the portfolio.
Marsh / Marsh Broker Japan
Type: Global insurance broker and risk adviser
Marsh is one of the world’s largest insurance brokerage and risk advisory organizations.
In Japan, Marsh and Marsh Broker Japan provide risk-management and insurance-related services to corporate clients.
For real estate investors, potential areas of support can include:
- Property risk
- Natural catastrophe exposure
- Business interruption
- Liability
- Construction
- Transactional risk
- Global insurance programs
A broker can be particularly useful when the investor wants to approach multiple insurance companies rather than negotiate separately with individual insurers.
Relevant For:
- Institutional investors
- Foreign investors
- Large property portfolios
- Global insurance programs
- Natural catastrophe risk
- Complex insurance placement
Official Website: Marsh Japan
Aon
Type: Global insurance broker and risk adviser
Aon is a major global professional services firm focused on risk and human capital.
In January 2026, Aon announced that it had obtained an insurance broker license in Japan and established a corporate brokerage division within Aon Solutions Japan.
The expansion allows Aon to provide corporate brokerage services alongside its existing advisory capabilities in Japan.
For institutional property investors, Aon’s global platform can be relevant to:
- Property risk
- Natural catastrophe analysis
- Insurance placement
- Risk financing
- International portfolios
- Data and analytics
Relevant For:
- Foreign investors
- Institutional portfolios
- Global risk programs
- Natural catastrophe analysis
- Corporate insurance
Official Website: Aon Japan
WTW
Type: Global insurance broker and risk advisory company
WTW is another major global insurance and risk advisory organization with operations in Japan.
Its broader global capabilities include:
- Corporate risk
- Insurance broking
- Risk analytics
- Employee benefits
- Advisory services
For multinational real estate investors, an international brokerage platform can be useful when coordinating Japanese insurance with coverage in other countries.
Relevant For:
- Multinational investors
- Corporate risk
- Global insurance programs
- Risk analytics
- Institutional portfolios
Official Website: WTW
MST Insurance Service / Marsh Partnership
Type: Japanese corporate insurance agency and risk-management platform
MST Insurance Service is a major Japanese corporate insurance agency with relationships across the domestic insurance market.
Its collaboration with Marsh provides access to international insurance and risk-management capabilities.
This type of combination can be relevant to investors seeking:
Japanese insurance-market relationships
plus
international brokerage capabilities.
Relevant For:
- Japanese corporations
- Commercial property
- Corporate insurance
- International programs
Official Website: MST Insurance Service
Selected Commercial Real Estate Insurance Market Participants
| Company | Type | Selected Areas of Relevance |
|---|---|---|
| Tokio Marine & Nichido | Japanese insurer | Property, liability, construction, corporate risks |
| Mitsui Sumitomo Insurance | Japanese insurer | Property, business interruption, liability |
| Sompo Japan | Japanese insurer | Property, liability, construction, risk management |
| Aioi Nissay Dowa | Japanese insurer | Property and corporate insurance |
| Nisshin Fire | Japanese insurer | Property and casualty insurance |
| AIG | International insurer | Property, casualty, specialty, global programs |
| Chubb | International insurer | Property, earthquake, BI, liability |
| Zurich | International insurer | Corporate and global insurance |
| Allianz | International insurance group | Large corporate and global risks |
| Starr | International insurer | Commercial and specialty risks |
| Marsh | Insurance broker | Institutional and global risk programs |
| Aon | Insurance broker | Corporate risk and insurance brokerage |
| WTW | Insurance broker | Corporate risk and global programs |
| MST Insurance Service | Insurance agency / risk adviser | Japanese corporate insurance |
This table is intended as an orientation rather than a ranking.
Property Insurance
The foundation of commercial real estate insurance is generally protection against physical damage to the property.
Potential insured events can include:
- Fire
- Lightning
- Explosion
- Wind
- Hail
- Snow
- Flood
- Water damage
- Other accidental physical damage
Actual coverage varies substantially by policy.
Investors should therefore review:
what is covered
and equally importantly:
what is excluded.
Earthquake Risk
Earthquake risk requires particular attention in Japan.
Foreign investors should not assume that ordinary commercial property insurance automatically provides full earthquake protection.
Earthquake-related coverage may need to be:
- Specifically arranged
- Subject to separate limits
- Subject to deductibles
- Priced separately
- Restricted depending on property characteristics
Potential earthquake-related events include:
- Structural damage
- Fire following earthquake
- Tsunami
- Business interruption
- Equipment damage
The amount of insurance capacity available may also depend on market conditions.
This is one reason institutional investors often involve specialist insurance advisers or brokers.
Engineering Reports and Earthquake Risk
Insurance analysis should not be separated from technical due diligence.
Before underwriting a building, relevant information may include:
- Building age
- Structural system
- Seismic performance
- PML
- Location
- Construction
- Loss history
Technical due diligence can therefore provide information useful for insurance analysis.
For more on physical property risk, see Major Real Estate Engineering and Technical Due Diligence Firms in Japan.
Typhoon and Flood Risk
Japan also experiences significant risks from:
- Typhoon
- Heavy rainfall
- Flood
- Storm surge
Location therefore matters.
A property near:
- River
- Coast
- Low-lying area
may have a different risk profile from a comparable property elsewhere.
Investors may review hazard maps and technical information as part of:
acquisition DD
and
insurance underwriting.
Business Interruption Insurance
Property damage can affect more than the physical building.
Suppose a hotel suffers major damage.
The investor may face:
Repair Cost
Lost Operating Income
The same principle can apply to:
- Retail
- Hotels
- Logistics
- Data centers
- Other operating assets
Business interruption coverage may therefore be particularly important for assets where property income depends directly on continuing operations.
Liability Insurance
Property owners can also face liability claims.
Examples might include:
- A visitor is injured at the property
- Part of the building falls and damages third-party property
- Building management failures cause injury
- Construction work damages neighboring property
Liability insurance can therefore form another part of the insurance program.
Construction Insurance
Development and renovation create additional risks.
Relevant coverage may include:
- Construction works
- Materials
- Contractor liability
- Third-party liability
- Delay-related risks
Investors undertaking major development or value-add strategies should coordinate insurance with:
- Developer
- General contractor
- Lender
- Project manager
- Technical consultant
For major construction counterparties, see Major General Contractors and Construction Companies in Japan.
Insurance for Hotels
Hotels have a particularly broad risk profile.
Potential issues include:
- Property damage
- Business interruption
- Guest liability
- Food-related liability
- Employee-related risk
- Equipment breakdown
- Cyber incidents
- Natural catastrophe risk
The insurance structure may also depend on the contractual relationship between:
Owner
and
Hotel Operator.
The parties should understand which entity is responsible for arranging each type of insurance.
Insurance for Logistics Properties
Logistics facilities may require consideration of:
- Building damage
- Fire
- Tenant liability
- Stored goods
- Business interruption
- Natural disasters
- Equipment
Responsibility for insuring tenant inventory may differ from responsibility for insuring the building itself.
Insurance for Data Centers
Data centers introduce specialized risks.
Potential issues include:
- Electrical failure
- Cooling failure
- Fire
- Equipment damage
- Business interruption
- Cyber risk
- Service interruption
- Liability
The potential economic loss from operational interruption can be significant even when physical building damage is limited.
Insurance for Multifamily Property
Residential investment properties may require coverage for:
- Fire
- Water damage
- Natural disasters
- Building liability
- Equipment
Portfolio owners may be able to consolidate multiple properties into broader insurance arrangements.
Insurance and Real Estate Financing
Lenders generally have an interest in ensuring that collateral is appropriately insured.
Loan documentation may therefore include requirements relating to:
- Property insurance
- Insured amount
- Insurance company
- Policy period
- Loss-payee arrangements
- Assignment of insurance proceeds
A simplified relationship may look like:
Property
↓
insured by
↓
Insurance Company
while
Lender
has an interest in
↓
Insurance Proceeds
because the property secures the loan.
Investors should therefore coordinate insurance with the lender before closing.
For more on Japanese real estate financing providers, see Major Real Estate Lenders and Banks in Japan.
Insurance and Property Valuation
Insurance value and market value are not necessarily the same.
An appraisal may estimate:
Market Value
while an insurance program may consider:
Replacement / Reinstatement Cost
These are different concepts.
For example, the market value of a central Tokyo property may contain a substantial land component.
But rebuilding insurance relates primarily to the cost of replacing the physical improvements.
Investors should therefore avoid assuming:
Appraised Value = Appropriate Insurance Amount
For more on valuation providers, see Major Real Estate Appraisal Firms in Japan.
Who Arranges Insurance?
The answer depends on the ownership and management structure.
Insurance may be coordinated by:
- Property owner
- Asset manager
- Property manager
- Insurance broker
- Insurance agency
- Developer
- Operator
For institutional investment structures, the asset manager often plays an important coordination role.
How Foreign Investors Can Find Insurance Providers in Japan
Foreign investors do not necessarily need to contact insurance companies individually.
Several routes are available.
Ask the Asset Manager
An experienced Japanese asset manager may already work with:
- Insurance companies
- Brokers
- Agencies
across multiple properties.
The AM may understand what insurance is commonly required for the relevant:
- Asset class
- Financing
- Fund structure
For more on selecting an AM, see How to Choose a Commercial Real Estate Asset Manager in Japan.
Ask the Property Manager
Property managers deal with the physical operation of buildings.
They may therefore have practical experience with:
- Property claims
- Water damage
- Liability incidents
- Equipment failures
- Insurance procedures
For major PM companies, see Major Property Management Companies in Japan.
Ask the Lender
The lender may specify minimum insurance requirements under the loan agreement.
It can therefore be useful to ask:
What coverage will the lender require?
before finalizing the insurance program.
Ask the Developer
If an investor is buying a newly developed property, the developer may also be able to introduce insurance providers or advisers.
Developers continuously manage:
- Land
- Construction
- Completed buildings
- Corporate insurance
and may therefore have longstanding relationships with insurers.
For major developers, see Major Real Estate Developers in Japan.
Ask an Insurance Broker
For larger or more complicated assets, going directly to an insurance broker can be efficient.
The broker can potentially approach multiple insurance markets and help compare:
- Coverage
- Limits
- Deductibles
- Exclusions
- Pricing
This may be particularly useful for foreign investors unfamiliar with the Japanese insurance market.
How to Choose an Insurance Broker
There is no universally best broker.
Investors should consider:
Real Estate Experience
Does the broker regularly handle commercial property?
Natural Catastrophe Expertise
Can the broker analyze exposure to:
- Earthquake
- Typhoon
- Flood
International Capability
Can the broker coordinate with:
- Overseas headquarters
- Global insurance programs
- International lenders
- Foreign investment managers
Asset-Class Experience
Hotels, data centers and logistics facilities can have very different insurance requirements.
Claims Capability
Buying insurance is only one part of the relationship.
Investors should also consider how the broker supports clients after a major claim.
Market Access
A sophisticated insurance program may require access to multiple:
- Japanese insurers
- International insurers
- Reinsurance markets
Questions to Ask an Insurance Broker
Before appointing a broker, investors may ask:
- Do you regularly work with commercial real estate investors?
- Do you work with foreign investors in Japan?
- Which property insurers can you approach?
- Do you handle earthquake coverage?
- Do you model natural catastrophe exposure?
- Do you handle business interruption insurance?
- Do you have hotel insurance experience?
- Do you have logistics experience?
- Do you have data-center experience?
- Can you coordinate global insurance programs?
- Can you work with our lender?
- Can you review existing insurance policies?
- How do you support claims?
- How are you compensated?
- What information do insurers require?
- How long will placement take?
Frequently Asked Questions
Who are the major commercial property insurance companies in Japan?
Major Japanese insurers include Tokio Marine & Nichido, Mitsui Sumitomo Insurance, Sompo Japan and Aioi Nissay Dowa Insurance.
International insurers active in Japan include AIG and Chubb, among others.
This is not an exhaustive list.
Who are the major insurance brokers in Japan?
Global insurance brokerage groups active in Japan include Marsh, Aon and WTW.
Japan also has major domestic insurance agencies and risk advisers.
Does commercial property insurance automatically cover earthquakes in Japan?
Investors should not assume that ordinary property coverage automatically provides the earthquake protection they require.
Earthquake coverage should be specifically reviewed with the insurer, agent or broker.
Does property insurance cover business interruption?
Some commercial insurance programs can include business interruption-related coverage.
Actual coverage depends on the policy.
Does a lender require insurance?
Real estate loan documentation commonly contains insurance requirements designed to protect the collateral and associated cash flows.
Can an asset manager arrange insurance?
An asset manager may coordinate insurance arrangements or work with brokers and insurance agencies on behalf of the investment structure, depending on its role.
Should a foreign investor use an insurance broker?
It depends on the size and complexity of the investment.
A broker can be particularly useful for large properties, portfolios, specialized assets and international investors requiring access to multiple insurance markets.
Can a developer introduce an insurance company?
Potentially.
Developers regularly arrange insurance for land, construction and completed properties and may have established relationships with insurers and insurance intermediaries.
Is insurance value the same as appraised value?
No.
Market appraisal and insurance replacement cost serve different purposes and may produce very different figures.
Conclusion
Insurance is an important component of commercial real estate risk management in Japan.
Investors may encounter major domestic insurers including:
- Tokio Marine & Nichido
- Mitsui Sumitomo Insurance
- Sompo Japan
- Aioi Nissay Dowa Insurance
- Nisshin Fire & Marine Insurance
as well as international insurers including:
- AIG
- Chubb
- Zurich
- Allianz
- Starr
Institutional investors may also work with insurance brokers and advisers including:
- Marsh
- Aon
- WTW
- MST Insurance Service
The appropriate insurance structure depends on:
property type
location
natural catastrophe exposure
financing
ownership structure
operations
and
investor requirements.
Foreign investors should therefore consider insurance as part of the acquisition process rather than something to arrange only after closing.
The process may involve coordination among:
Investor
Asset Manager
Property Manager
Lender
Technical Consultant
Insurance Broker
and
Insurance Company.
In a market exposed to earthquake, typhoon, flood and other natural hazards, understanding how risks are:
identified
quantified
mitigated
and
insured
is an important part of long-term commercial real estate investment in Japan.
References
- Tokio Marine & Nichido
- Mitsui Sumitomo Insurance
- Sompo Japan
- Aioi Nissay Dowa Insurance
- AIG Japan
- Chubb Japan — Business Insurance
- Chubb Japan — Property Insurance
- Marsh Japan
- Aon Japan
- WTW
- MST Insurance Service
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