Record property decisions and consents

Recording decisions and consents during Japanese property due diligence

When you evaluate a property for redevelopment or rebuilding, you are not looking for one document that settles the question. You are assembling a decision trail: the ownership chain, the encumbrances, the planning constraints, the tenancy position, and the approvals that have been given or withheld. The purpose of that trail is simple: so a later reviewer, whether an investor, a bank, a co-owner, or a court, can reconstruct why you chose one path and rejected another.

The core problem is fragmentation. Japanese property records are not one central database. The land register (登記簿) is kept at the Legal Affairs Bureau (法務局) that has jurisdiction over the parcel; cadastral maps (地図) are maintained separately; building confirmation applications (建築確認申請) sit with the municipal planning department; and the koseki (戸籍) needed for inheritance research is held by the local municipality that registered the family event. No unified national portal gives a private researcher all of these at once. A choice made on the basis of one record can be invalidated by a conflicting entry in another. A dated log is the only way to make the search reproducible.

The method below is built for the situation where you are assembling records for a redevelopment or renovation project in Japan, not for giving legal advice. It gives you a trail you can hand to a lawyer, judicial scrivener (司法書士), land and building surveyor (土地家屋調査士), or real-estate appraiser so they can verify the work you have done and advise on the next step. The pillar contract: give each question to the appropriately licensed professional and preserve an auditable trail.

What you are trying to reconstruct

A decision record is not a summary of the documents you found. It is a chronological reconstruction of how a conclusion was reached, so that a later reviewer, a lender, a co-owner, a tenant, a lawyer, or a successor, can see the same evidence and arrive at the same result. The record must answer five questions:

1. What was decided?
2. Who made the call and under what authority?
3. What evidence was reviewed?
4. What assumptions were made?
5. What conditions remain unresolved?

For property research in Japan, the evidence is rarely in one place. Ownership is recorded at the Legal Affairs Bureau (法務局) that has jurisdiction over the parcel; zoning and building controls are administered by the municipal planning department; and tax valuations sit in the municipal fixed-asset ledger. Each record type has a different custodian, update cycle, and legal weight. A dated log is the only way to reconstruct, months later, why a particular parcel was accepted or rejected.

Why a dated log is the core deliverable

A property determination is not a document; it is a sequence of choices. The sequence usually starts with a question such as “Is this parcel large enough for redevelopment under the current zoning?” and ends with a signed agreement, a permit application, or a walk-away. The log must let a later reviewer reconstruct every step: what you assumed, what you checked, what you rejected, and what remains unresolved.

A log entry written on the day it happens is far more credible than a summary written three months later. If a later dispute arises, whether with a co-owner, a tenant, a bank, or a municipal planning officer, the log is the record that shows what was known, when it was known, and who was responsible. It does not replace the advice of a licensed professional, but it preserves the trail so that advice can be checked later.

How to structure a dated log

Record each choice as a dated entry with five fields:

• Date: the date the conclusion was reached, not the date the record was written.
• Question: the exact question being answered.
• Evidence source: the named official registry, statute, or professional consulted.
• Assumption: any fact you treated as true without direct verification, and why.
• Resolution or open item: the conclusion reached, or the condition still pending.

Keep the log in a format that can be read by someone who was not present. Use one row per entry. If one entry depends on a prior entry, link the rows explicitly. This creates an auditable trail that a later reviewer, a lender, or a buyer can follow without asking you what you meant.

Write each entry as a single line with a clear subject, then attach the supporting evidence. For example:

• 2024-06-11, Parcel boundary method: adopted the cadastral map (地図) over the older survey sketch because the Legal Affairs Bureau’s digitised parcel layer shows a 0.3 m discrepancy along the north boundary. The land surveyor (土地家屋調査士) will confirm before purchase.
• 2024-06-11, Ownership chain: traced through the land register (登記簿) at the local Legal Affairs Bureau; three owners since 1985, no unresolved mortgages.
• 2024-06-12, Zoning: confirmed commercial district under the local urban planning map; FAR 400%, BCR 80%, but the road setback reduces the buildable footprint by about 12% (see the calculation sheet, tab “Setback”).
• 2024-06-12, Assumption: the 1981 building was constructed under the current Building Standards Act; to be confirmed by the building confirmation application and a licensed architect before purchase.
• 2024-06-13, Unresolved: second-floor tenant lease term unknown; obtain a copy of the lease from the current owner before the contract deadline.

What “recording a choice” means in property research

A property determination is not a single signature. It is a chain of smaller calls: which parcel boundary to trust, which registry entry to treat as current, which zoning map to apply, which tenant document to accept as proof of lease terms. Each of those calls can be reconstructed later only if it is dated and attributed. In due diligence, the record is the deliverable; the report is the summary.

The core records are fragmented. The land register (登記簿) is held at the local Legal Affairs Bureau (法務局) that has jurisdiction over the parcel. The cadastral map (地図) is a separate official layer, often digitised but not always consistent with the register. Building confirmation applications (建築確認申請) sit with the municipality that issued the permit. Urban planning maps are published by the local government planning department. There is no unified national portal for private use, so a log must record which source was consulted, on what date, and what it showed.

The consent register

Beyond the log of choices, track every consent separately. For a redevelopment or rebuilding project, consents may include:

• Co-owner approvals under the condominium reconstruction law (マンション建替え等円滑化法)
• Tenant lease surrender agreements
• Lender releases of existing mortgages
• Neighbouring landowner boundary confirmations
• Municipal planning clearances

Record each consent with the date requested, the date received, the granting party, and any conditions attached. A consent that is promised but not documented is a gap in the file. Treat it as an unresolved condition until the signed document is in hand.

The assumption record

Every property file contains assumptions: facts you treat as true without independent verification because the cost or time to verify them is disproportionate. List each assumption explicitly. For each one, note why you accepted it and what would change if it turned out to be wrong. A later reviewer who sees the assumption record can decide whether to re-test the assumption or accept it and move on.

The unresolved-conditions list

Keep a running list of every item that remains open. For each, state:

• The condition
• The action required to close it
• Who is responsible for that action
• The deadline, if any

Review the list at the end of each week. An unresolved condition that sits for more than a month without action is a risk. Escalate it or document why it can wait.

When to stop and hand off to a professional

The log, consent register, assumption record, and unresolved-conditions list are tools for organising research. They do not replace a licensed professional. Stop your own research and hand the file to a qualified practitioner when:

• You are interpreting a statute, ordinance, or regulation and the plain reading is ambiguous.
• You are assessing the legal effect of a registered encumbrance, such as a mortgage, a leasehold right, or an easement.
• You are evaluating whether a building confirmation application complies with the Building Standards Act.
• You are calculating tax liability, including acquisition tax, fixed-asset tax, or capital gains.
• You are negotiating a contract, a lease surrender, or a co-owner agreement.

The file you hand over should contain the dated log, the consent register, the assumption record, and the unresolved-conditions list. That file lets the professional see exactly what you did, what you assumed, and what remains open, so they do not duplicate work or miss a gap.