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How to Write a Will for Real Estate Inheritance: Types, Rules, and Key Considerations

A thorough guide to drafting a will for the smooth inheritance of real estate in Japan: the different types of wills, legal requirements, and essential points to avoid common mistakes.

Last updated: About 4 min read

For anyone who owns real estate, planning for inheritance is a challenge that cannot be put off indefinitely. Without a will, there is a real risk that the property you worked to build will not end up in the hands of the person you actually wanted to receive it. This article explains why a will matters for real estate inheritance, the different types of wills available, the rules for writing one, and the pitfalls to watch out for. Because Japan's inheritance system differs from the will and probate systems used in English-speaking countries, we compare the two throughout, particularly around the Japanese concept of a legally protected minimum share, which has no direct equivalent in most common-law jurisdictions.

Why Is a Will Necessary for Inheriting Real Estate?

The single biggest reason a will is necessary is to prevent disputes among the heirs. Without a will, the legally recognized heirs must come together and negotiate a division of the estate among themselves, and the number of these estate-division disputes has been rising year after year.

Readers familiar with will and probate systems in the US or UK will recognize the underlying problem: whenever several people inherit an interest in the same asset without clear written instructions, disagreement becomes more likely. Japan, like those countries, has a default statutory order of heirs when no will exists, but the difficulty of dividing jointly held real estate makes the absence of a will a common source of friction.

People Who Especially Need a Will

  • Real estate owners: unlike cash, real property is difficult to divide neatly among multiple heirs, which makes it a frequent source of conflict
  • Anyone who wants to decide the distribution personally: instructions in a will take precedence over the default statutory shares
  • Anyone with no statutory heirs: without a will, property with no eligible heir ultimately reverts to the state
  • Anyone who wants to exclude a particular person: a will can be used to disinherit someone or reduce their share to zero

What Types of Wills Are There?

Japanese law recognizes three types of wills, each governed by its own set of rules.

Holographic Will (Self-Written Will)

This is a will that the testator writes entirely by hand, dates, signs, and seals personally.

  • Advantages: no cost is involved, and it can be written at any time
  • Disadvantages: it carries a real risk of being invalidated for a formal defect, and it can be lost or tampered with

Since July 2020, a system allowing these wills to be deposited for safekeeping at a Legal Affairs Bureau has been available, reducing the risk of loss. This custodial system has no precise equivalent in most Western countries, where a handwritten will is typically kept by the testator, a lawyer, or a bank rather than lodged with a government office.

Notarized Will (Public Will)

This is a will drawn up by a notary based on the testator's stated wishes.

  • Advantages: there is no risk of a formal defect, and the original is kept on file at the notary's office
  • Disadvantages: a notary fee applies, and at least two witnesses are required

For real estate inheritance, a notarized will is recommended because of the higher degree of certainty it provides. This is comparable to having a will drafted with a lawyer's help in the US or UK, though a Japanese notary's role does not map exactly onto that of a solicitor or estate attorney abroad.

Sealed (Secret) Will

This method keeps the contents of the will confidential while having a notary certify that the document exists. In practice, it is very rarely used.

How Do You Write a Will for Real Estate Inheritance?

When listing real estate in a will, it is essential to include accurate, precise information about the property.

How to Describe the Real Estate

The will should describe the property exactly as it appears in the certified copy of the property register, including the following details.

  • Land: location, lot number, category of land use, and land area
  • Buildings: location, building number, type, structure, and floor area
  • Condominium units: a description of the building as a whole in addition to a description of the exclusively owned unit

Because a property's residential address and its registered location can differ, always check the certified copy of the property register before writing the description into the will.

Basic Format for Writing a Will

  1. Write "Will" (or an equivalent title) at the top of the document
  2. Clearly state who each heir is and exactly which assets they are to receive
  3. Name an executor to administer the will (this keeps the later procedures moving smoothly)
  4. Write the date precisely (a vague date such as "an auspicious day" makes the will invalid)
  5. Sign and seal the document (using a registered personal seal is recommended)

The exact-date requirement and strict rules against ambiguity serve much the same purpose as the witnessing and execution formalities required for a will to be admitted to probate in the US or UK.

What Points Should You Be Careful About in a Real Estate Inheritance Will?

There are several considerations specific to real estate that are worth understanding in detail.

Consideration for the Forced Heirship Share (Iryūbun)

Even if a will leaves the entire estate to one particular heir, the other statutory heirs generally retain the right to claim a legally reserved minimum share, known in Japanese as iryūbun, which is ordinarily equal to one-half of what their statutory share would otherwise have been, except that when the only statutory heirs are lineal ascendants (such as the deceased's parents), it is one-third of the estate. A will that disregards this reserved share can easily become the seed of a later dispute.

This is one of the clearest points of divergence from common law. In most US states, the guiding principle is testamentary freedom: apart from a surviving spouse's right to elect against the will for a statutory share, a person is generally free to leave everything to whomever they choose, with no other relative holding an automatic claim. England and Wales work similarly: a spouse, child, or dependant left without adequate support can ask a court for "reasonable financial provision," but this is a discretionary claim decided case by case, not a fixed fraction the way iryūbun is in Japan. A Japanese will leaving everything to one heir is far more exposed to challenge, so the reserved share should be treated as a hard constraint, not a suggestion.

Avoiding Co-Ownership

When several heirs end up co-owning the same piece of real estate, any sale or use of the property requires the agreement of every co-owner, which makes the property difficult to manage. Wherever possible, arrange for the property to pass to a single heir, or consider an equalization payment to the other heirs instead so that ownership does not end up fragmented.

Considering Inheritance Tax

Establish the assessed value of the real estate for inheritance tax purposes in advance, and factor a broader asset strategy into your overall approach to inheritance planning.

Periodic Review

A will should be reviewed whenever real estate is bought or sold, or whenever the composition of the family changes.

The Process of Drafting a Will

  1. Take stock of your assets: make a list of all the real estate and financial assets you own
  2. Confirm who the heirs are: verify the statutory heirs using the family register
  3. Decide on a distribution policy: determine who should receive what
  4. Draft the will: prepare it as either a holographic will or a notarized will
  5. Arrange for safekeeping: use the Legal Affairs Bureau custody system or keep it on file at a notary's office

Frequently Asked Questions (FAQ)

Q. At What Age Should You Start Making a Will?

You should start thinking about it as soon as you own real estate. Regardless of age, preparing for the unexpected is what matters.

Q. Can You Rewrite a Will as Many Times as You Want?

Yes. Because the will with the most recent date takes precedence, you can update it as many times as your circumstances change.

Q. How Much Does It Cost to Create a Notarized Will?

The notary fee is calculated based on the value of the assets involved. For real estate assessed at 50 million yen, the fee comes to roughly 29,000 yen.

Q. Can Real Estate Be Inherited Without a Will?

Yes, it is possible, but doing so requires an estate-division agreement reached by all of the statutory heirs together, and if they cannot reach an agreement, the matter risks escalating into mediation or a formal ruling in family court.

Daisuke Inazawa, President & CEO of INA&Associates Inc.

Author

President & CEOINA&Associates Inc.

President & CEO of INA&Associates Inc. Leads real estate brokerage, rental leasing, and property management across Greater Tokyo and the Kansai region. Specialises in income-property investment strategy and advisory for ultra-high-net-worth individuals.

Daisuke Inazawa is the President and CEO of INA&Associates Inc., a Japanese real estate firm headquartered in Osaka with a Tokyo branch. He leads the company's three core businesses — real estate sales brokerage, rental leasing, and property management — across the Greater Tokyo Area and the Kansai region.

His areas of expertise include investment strategy for income-generating real estate, profitability optimisation of rental operations, real estate advisory for ultra-high-net-worth individuals (UHNWIs) and institutional investors, and cross-border real estate investment. He provides data-driven, long-horizon advisory to investors in Japan and overseas.

Under the management philosophy "a company's most important asset is its people," he positions INA&Associates as a "people-investment company" and is committed to sustainable corporate-value creation through talent development. He also writes and speaks publicly on leadership and organisational culture in times of change.

He has passed eleven Japanese professional qualification examinations: Licensed Real Estate Broker (Takken), Certified Real Estate Consulting Master, Licensed Condominium Manager, Licensed Building Management Supervisor, Certified Rental Housing Management Professional, Gyōseishoshi Lawyer (administrative scrivener), Certified Personal Information Protection Officer, Class-A Fire Prevention Manager, Certified Auctioned Real Estate Specialist, Certified Condominium Maintenance Engineer, and Licensed Moneylending Operations Supervisor.

  • Licensed Real Estate Broker (Takken)
  • Certified Real Estate Consulting Master
  • Licensed Condominium Manager
  • Licensed Building Management Supervisor
  • Certified Rental Housing Management Professional
  • Gyōseishoshi Lawyer (Administrative Scrivener)
  • Certified Personal Information Protection Officer
  • Class-A Fire Prevention Manager
  • Certified Auctioned Real Estate Specialist
  • Certified Condominium Maintenance Engineer
  • Licensed Moneylending Operations Supervisor