How to Read Japan's Important Matters Explanation Before Signing

Treat the document as a decision gate

The important-matters explanation, jūyō jikō setsumeisho (重要事項説明書), should be understood before the sale contract is executed. It is prepared and explained by a licensed real-estate transaction specialist for a brokered transaction. Its function is not to certify that the property is good. It is to disclose defined legal and transaction matters so the buyer can decide whether the price and contract remain acceptable.

Ask for the draft and supporting documents early enough to review them, translate material parts, and obtain specialist input. A same-day reading immediately before signing defeats the commercial purpose even if the formal explanation occurs. Keep a question log with the source document, answer, responsible person, and whether the answer must be written into the contract.

Reconcile the property and rights being sold

Start with the legal description. List every land parcel, building record, condominium unit, co-ownership share, private-road share, leasehold interest, easement, and ancillary right. Match the registered owner to the seller and identify mortgages, attachments, or other registered interests. Confirm how they will be discharged or transferred at settlement.

The registry does not prove the physical boundary, building condition, compliance, or actual use. Compare registered land and building descriptions with survey material, public maps, architectural records, tax records, and what is visible on site. A difference in floor area, structure, parcel count, address, or use is not a clerical detail until its cause and consequence are understood.

For leasehold, read the lease itself. Record the type of right, remaining term, ground rent, revision mechanism, renewal or expiry, transfer and rebuilding consent, mortgage restrictions, restoration duty, and any consent fee. A summary label such as “leasehold” does not price those terms.

Read road and planning sections together

The road entry should identify the legal road classification, width, frontage, private ownership, setback, and access burden. Link it to the planning entries for zoning, building-coverage ratio, floor-area ratio, height, fire controls, district plans, and other restrictions. A nominal floor-area ratio may be reduced by road width or site conditions; a setback may reduce effective site area.

Ask for the authority's road record or investigation, not only a broker's description. Confirm whether the physical route used to reach the site is the legal route, whether vehicles can enter, and whether utilities cross private land. For a house, obtain a written rebuildability conclusion from the professionals reviewing the current property. For vacant land, test the proposed building rather than assuming the maximum percentages can be used in practice.

Hazard-map disclosure should identify where the property sits on the relevant current municipal maps. It does not quantify every loss scenario or replace insurance analysis. Review flood depth, landslide, tsunami, storm-surge, liquefaction, evacuation routes, retaining walls, and access interruption according to location.

Test the building record and current condition

Record the building-confirmation and inspection-certificate history, construction date, structure, registered area, current use, and known alterations. The absence of an inspection certificate is not by itself proof that the building is illegal; it is a gap that may require a current-status investigation. An unregistered extension or conversion can affect lender acceptance, insurance, renovation, rebuilding, and resale.

If a condition investigation was performed, read its date, scope, qualifications, inaccessible areas, observations, and recommendations. An inspection is not a warranty, complete destructive survey, seismic diagnosis, code-compliance certificate, or repair-cost guarantee. Use findings to commission targeted roof, waterproofing, structure, services, termite, retaining-wall, or environmental review where warranted.

For a condominium, connect the unit disclosure to the building records. Management fees, repair-reserve contributions, arrears, planned increases, special assessments, long-term repair plan, recent minutes, bylaws, renovation rules, leasing rules, parking, pets, and known defects can change both use and value.

Separate occupancy and operating obligations

For a tenant-occupied purchase, the explanation should be reconciled with the lease, amendments, deposit, guarantee arrangement, payment record, renewal, termination provisions, restoration history, and property-management agreement. Confirm which obligations and tenant funds transfer to the buyer. Scheduled rent is not the same as collectible cash flow.

For intended minpaku, office, clinic, retail, or other non-standard use, check national law, local ordinance, planning and building status, fire requirements, lease terms, and condominium rules separately. One permission does not override another restriction.

For vacant possession, state who occupies the property, when and how it will be vacated, what happens if it is not, and whether personal property or leases remain. Do not leave possession as an informal promise.

Connect the money clauses to the sale contract

Reconcile price, deposit, balance, tax and fee adjustments, brokerage, tenant deposits, management arrears, cancellation, default, financing, defect responsibility, risk transfer, and handover across the explanation and contract. A statutory maximum brokerage fee is a cap, not evidence that the cap was agreed. Confirm the actual engagement and consumption-tax treatment.

If finance is required, the financing condition should match the intended borrower, purpose, amount, lender process, application deadline, and consequence of failure. If a buyer changes the borrower, fails to apply, or rejects finance that meets the contractual definition, protection may not operate as assumed.

Special agreements deserve the most attention because they modify the standard allocation. Translate them completely. Ask what problem each clause addresses, which party bears it, what evidence triggers it, and what remedy exists.

Produce a one-page exception report

Before signing, reduce the file to an exception report containing: unresolved facts; deviations between registry, authority records, and physical condition; future cost obligations; use restrictions; title or access dependencies; financing conditions; documents promised after signing; and clauses that allocate risk to the buyer. Assign each item one outcome—resolved, priced, contractually protected, accepted with reason, or walk away.

The right conclusion is not that the explanation has many pages. It is that the buyer can state what is being acquired, what may be done with it, what must be paid, what remains uncertain, and what happens if the transaction fails.

Primary sources

• RETIO — Real-estate transaction Q&A: https://www.retio.or.jp/info/qa/
• RETIO — Buying and selling Q&A: https://www.retio.or.jp/info/qa/qa1/
• MLIT — Foreign-customer transaction guidance and tools: https://www.mlit.go.jp/totikensangyo/const/totikensangyo_const_tk1_000057.html
• MLIT — Existing-home condition investigations in transactions: https://www.mlit.go.jp/tochi_fudousan_kensetsugyo/const/tochi_fudousan_kensetsugyo_const_tk3_000001_00063.html
• MLIT — Water-hazard location disclosure: https://www.mlit.go.jp/report/press/totikensangyo16_hh_000205.html

Reviewed against the linked sources on 23 August 2026. Property-specific Japanese records and the executed contract control.