Condominium Due Diligence in Japan: Minutes, Reserves, Rules, and Planned Repairs

The unit and the building are one decision

A renovated apartment can sit inside a poorly governed building, while a dated interior can sit inside a well-funded and carefully maintained one. The buyer acquires the exclusive-use unit and an economic relationship with the land, common areas, management association, rules, and future repair obligations. Due diligence must therefore answer two questions separately: is the apartment suitable, and is the building organisation capable of maintaining the shared asset?

The minimum useful review includes the management bylaws, use rules, recent general-meeting minutes, financial statements, current budget, long-term repair plan, reserve-fund balance, arrears information, management-company agreement, repair history, planned major work, insurance information, and notices of disputes or defects. Availability and document names vary. A missing document is not proof of a problem, but it is a reason to establish why it is missing and what cannot be verified without it.

Start with the association's operating record

The management association, or kanri kumiai (管理組合), is made up of the unit owners. Its general meetings approve budgets, rules, major repairs, special assessments, and other decisions that can affect use and value. Read at least the most recent two or three annual-meeting records and any extraordinary-meeting records covering major work or disputes.

Minutes should be read for decisions and for repeated non-decisions. A proposal postponed for three years may matter more than a routine approval. Look for water ingress, façade issues, elevator renewal, plumbing replacement, seismic discussion, short-term rental complaints, delinquent fees, litigation, management-company changes, caretaker reductions, or debate over increasing reserves. Record the vote, expected timing, cost estimate, and whether funding was actually approved.

Confirm that meetings are being held and that accounts are approved. Japan's management-plan certification framework uses regular general meetings, appropriate bylaws, separated accounting for management fees and repair reserves, owner and resident lists, and a credible long-term repair plan as important indicators. Certification is not required for every sound building, and absence of certification is not a defect, but the criteria provide a useful diligence framework.

Reconcile the repair plan with the money

The long-term repair plan, chōki shūzen keikaku (長期修繕計画), should describe the expected scope, timing, and estimated cost of common-area work. MLIT's current certification criteria refer to a plan of at least 30 years with at least two major repair cycles remaining in that period. The important diligence question is not whether a plan exists. It is whether the plan is current, the assumptions match the building, and the reserve contributions can fund it.

Compare four figures: current reserve balance, annual reserve contributions, forecast expenditure, and the number of units expected to bear the cost. Then inspect how the plan treats inflation, construction-cost changes, elevator renewal, mechanical parking, external walls, roofs, waterproofing, plumbing, and items that have already been deferred. A plan last updated before a major cost increase may be arithmetically neat but economically weak.

Ask for the contribution schedule by unit as well as the building total. Contributions may follow ownership share, floor area, or another formula in the bylaws, so dividing a projected shortfall equally by the number of units can misstate the subject unit's exposure. Also identify commercial units, developer-held units, or parking facilities whose rights and obligations differ from ordinary residences.

Consider an illustrative 60-unit building with JPY 90 million in reserves and a JPY 180 million major-repair estimate due in three years. If annual contributions add JPY 18 million and no other major expenditure is planned, the reserve might reach approximately JPY 144 million before the work—still JPY 36 million short before allowing for cost escalation. That gap could be addressed through higher monthly contributions, borrowing, scope changes, delay, or a special assessment. The buyer should not assume which option will be chosen; the minutes and approved budget should show the actual plan.

Test monthly fees and arrears

Management fees, kanrihi (管理費), fund day-to-day services. Repair reserve contributions, shūzen tsumitatekin (修繕積立金), fund planned common-area work. Keep them separate in the acquisition model. A low combined monthly charge is not automatically favourable if it has produced an underfunded building.

Request the amount attributable to the subject unit, any scheduled increases, and any unit-specific arrears. Confirm how arrears transfer on sale and how they will be settled. Also review building-wide delinquency: persistent unpaid contributions reduce cash available and can signal governance or collection problems. Ask whether parking income or other non-owner income supports the budget and whether that income is stable.

For an investment unit, include management fees and reserve contributions in the cash-flow model even if one of them may receive different tax treatment. For an owner-occupier, treat both as continuing housing costs. Neither should be hidden outside the affordability analysis.

Read the rules against the intended use

The registered title does not answer every use question. Management bylaws and detailed use rules can restrict pets, instruments, floor materials, renovation hours, wet-area relocation, exterior equipment, signs, office use, short-term accommodation, deliveries, bicycles, parking, or leasing procedures. The current MLIT standard bylaws are a model, not the binding rules for a specific building. Obtain the building's adopted and amended version.

If renovation is planned, request the approval procedure and technical standards before finalising a budget. If the property will be rented, confirm notice requirements, tenant rules, and whether minpaku or other short-stay use is prohibited. MLIT's guidance for foreign unit owners specifically advises checking association bylaws before operating private lodging. A broker's verbal statement that “renting is allowed” is not enough when the intended model is short-term accommodation or business use.

Inspect the physical record alongside the documents

Documents and inspection answer different questions. Minutes can identify a known leak; an inspection can assess visible current conditions. A reserve plan can budget façade work; it cannot confirm the condition inside the subject unit. Review seller disclosures, repair history for the unit, common-area inspection material, building insurance, and any building condition survey. For reinforced-concrete apartment buildings, MLIT currently treats certain building condition survey results as relevant to important-matters explanations when the survey is less than two years old.

Pay particular attention to shared pipes, waterproofing boundaries, window and sash responsibility, balcony status, mechanical parking, elevators, and any component where the association and unit owner may disagree over who pays. The best diligence result is not a promise that nothing will fail. It is a clear allocation of known work, likely timing, and financial responsibility.

Buyer checklist before contract

• Obtain current bylaws and all use or renovation rules.
• Read recent annual and extraordinary general-meeting minutes.
• Reconcile the reserve balance, annual contributions, and repair-plan expenditure.
• Identify special assessments, loans, contribution increases, and deferred work.
• Confirm subject-unit fees, arrears, parking rights, and transfer procedures.
• Check building-wide arrears and how they are being collected.
• Review management-company scope, caretaker coverage, and recent changes.
• Confirm the intended residence, rental, pet, office, renovation, or short-stay use is permitted.
• Review physical inspection material, seller disclosures, insurance, and repair history.
• Put unresolved building issues into the price, contract conditions, or decision to walk away.

Primary sources

• MLIT — Condominium management resources, repair-plan guidance, and reserve-fund guidance: https://www.mlit.go.jp/jutakukentiku/house/jutakukentiku_house_tk5_000052.html
• MLIT — For Foreign Unit Owners: Condominium Management in Japan: https://www.mlit.go.jp/jutakukentiku/house/content/001978283.pdf
• MLIT — Management Plan Certification System and current criteria: https://www.mlit.go.jp/jutakukentiku/house/keikakunintei.html
• MLIT — Standard Condominium Management Bylaws: https://www.mlit.go.jp/jutakukentiku/house/mansionkiyaku.html
• MLIT — Building condition surveys in existing-home transactions: https://www.mlit.go.jp/tochi_fudousan_kensetsugyo/const/tochi_fudousan_kensetsugyo_const_tk3_000001_00063.html

Reviewed against the linked primary sources on 23 August 2026. Building-specific documents and professional review control the acquisition decision.