Building age and management state — what really moves the risk score

You are looking at two condos in Tokyo. One is 8 years old. One is 32 years old. The price gap is large. The risk gap is larger — but not in the direction most buyers assume.

At RE : public, we run a structured risk score on every condo our clients ask about. Building age is one input. Management state is another. The two interact. And the second one moves the score more than the first, in almost every case we have analyzed.

This article explains how we weight them, what to look for, and where foreign buyers in Japan tend to misread the signals.

Why age alone tells you very little

Japanese condos (マンション) are built to evolving seismic codes. The most cited cutoff is the new earthquake standard (新耐震基準), which took effect in June 1981. Buildings whose construction permit was issued after that date are designed against a stronger ground motion assumption.

This single line — pre-1981 vs. post-1981 — moves more on the risk score than the raw year of construction. A 1985 building and a 2015 building are both post-standard. The 30-year age gap matters less than buyers expect.

What does age actually correlate with in our data?

• Insurance and loan terms. Some lenders shorten the maximum loan term once a building passes 35–40 years. This is a financing risk, not a structural one.
• Resale liquidity. Older buildings in central wards still trade, but the buyer pool narrows.
• Repair cycle position. A 25-year-old building is usually mid-way through its second large-scale repair cycle. A 12-year-old building is approaching its first.

Age is a proxy. Management state is the actual variable.

What we mean by "management state"

When we say management state (管理状態), we mean the operational and financial health of the condo association — the management union (管理組合) that every owner automatically joins on purchase.

We score management state on five inputs. In rough order of weight:

1. Repair reserve fund balance (修繕積立金)

This is the single largest driver in our model. Every condo collects a monthly repair reserve from each owner. That money pays for the long-term repair plan (長期修繕計画) — exterior waterproofing, piping, elevators, façade, roof.

What we check:

• Balance per square meter of total floor area. A healthy figure for a mid-rise Tokyo condo at year 15–20 is typically in the range of ¥10,000–¥20,000 per m² of unit area, but the right number depends on the plan.
• Whether the monthly reserve has been raised on schedule. The Ministry of Land, Infrastructure, Transport and Tourism (国土交通省) publishes guideline figures. Many older buildings still collect amounts set in the 1990s. That is a red flag.
• Whether the long-term repair plan has been updated in the last 5 years. Plans go stale. Construction costs in Japan have risen sharply since 2021.

A young building with an underfunded reserve carries more risk than an old building with a fully funded one. We have seen 10-year-old towers where the reserve is already behind schedule because the developer set the initial monthly amount artificially low to make the sale.

2. Delinquency rate (滞納率)

How many owners are behind on their monthly fees? The management report (管理組合の決算書類) will show this. A delinquency rate above roughly 3–5% of total billings is a tendency we flag. Above 10%, the building has a structural problem — collection is failing, and the reserve will not hit its targets even if the schedule looks fine on paper.

3. Past large-scale repair history (大規模修繕履歴)

Has the building completed its scheduled large-scale repairs? Most condos plan these at roughly 12-year intervals. We want to see:

• The first large-scale repair done on or near schedule.
• The second one (around year 24) done, with scope that included piping and waterproofing — not just cosmetic exterior work.
• Documentation of what was done, by whom, and at what cost.

A building that "deferred" its second repair to keep monthly fees low is borrowing from the future. That deferral shows up in the risk score as elevated risk, even if the building looks clean today.

4. Management company and meeting minutes (総会議事録)

Read the last two or three years of general meeting minutes. They are usually available on request before purchase. We look for:

• Contested votes on fee increases.
• Recurring complaints about water leaks, façade tiles, elevator faults.
• Board turnover. A board that cannot recruit owners to serve is a board that will not push hard decisions through.
• Whether management is self-managed (自主管理) or contracted to a management company. Self-managed buildings are not automatically worse, but they require more diligence from you as a buyer.

5. Management plan certification (管理計画認定制度)

Since April 2022, municipalities can certify condos that meet management standards under the management plan certification system (管理計画認定制度). Tokyo's 23 wards participate. Certification is not common yet, and absence of certification is not a negative signal on its own. But presence of certification is a meaningful positive — it means a third party has verified the plan, the reserve, and the meeting cadence.

How age and management interact in the score

Here is the pattern we see across the cases we have reviewed:

The two profiles foreign buyers most often misjudge are the first and the third.

The shiny new tower with low fees looks like a safe bet. Often it is not. The reserve is set to rise sharply at year 5, year 10, year 15. If the union does not approve those increases, the first large-scale repair around year 12 will hit a wall. We have seen towers issue special assessments of ¥1.5–3 million per unit because the reserve fell short.

The older retrofitted building looks risky on paper because of the year. But if the union has done seismic reinforcement (耐震補強) and kept its reserve healthy, the analysis result is often a moderate-risk asset with stable monthly costs and a clearer cost trajectory than the new tower.

What to actually request before you sign

When we run a second-opinion review, these are the documents we ask the seller's agent to produce. You can ask for them yourself. None are unusual to request in Japan.

• Important matters explanation document (重要事項説明書) — mandatory before contract.
• Management rules (管理規約) — bylaws, including pet, renovation, and rental rules.
• Long-term repair plan (長期修繕計画) — current version with date.
• Repair reserve balance and monthly reserve schedule.
• Past two to three years of general meeting minutes (総会議事録).
• Past two years of management union financial statements (収支報告書).
• Repair history list (修繕履歴) with dates and contractors.
• Delinquency summary — usually included in the financial statements.

If the agent resists producing any of these, treat that as a signal. In our experience, well-managed buildings have these ready in a binder.

A quick checklist for the viewing

You will not have time to read 200 pages of minutes during a 30-minute viewing. Use this short list at the property itself:

• Common areas. Are entrance lighting, mailboxes, bicycle parking maintained? Cracked tile, taped notices, broken fixtures — all are visible signals of weak management.
• Bulletin board. Read it. Disputes, parking violations, fee notices all surface here.
• Elevator inspection sticker. Date and inspector name should be current.
• Water meter and gas meter rooms. If you can see them, check for water staining or rust.
• Hallway air. Damp smell on upper floors can indicate roof or piping issues.

These are field signals, not a substitute for the documents. But a building that fails the field check rarely passes the document review.

The financing angle

If you are using a Japanese mortgage, your lender will look at building age. Common patterns:

• Most major banks lend up to 35 years on post-1981 buildings.
• Pre-1981 buildings often face term reductions or require a non-collapse certificate (耐震基準適合証明書).
• Some lenders cap loan-to-value lower on buildings over 30 years old.

Foreign buyers using non-resident or limited-residency loan products will see tighter conditions still. Build the financing constraint into your shortlist before you fall in love with a unit.

What moves the score most — summary

If we had to rank the inputs by how often they shift our final risk score, the order is:

1. Repair reserve adequacy relative to the long-term plan.
2. Delinquency rate.
3. Repair history execution.
4. Pre-1981 vs. post-1981 standard.
5. Raw building age.
6. Management plan certification status.

Age sits in the middle. Management state dominates the top.

This matters for your search strategy. Filtering listings by age alone — "nothing older than 15 years" — will cause you to overpay for new buildings with weak unions, and skip well-run mid-life buildings that offer better value per square meter and clearer cost visibility.

A note on what we do not score

We do not score "feel." We do not score the lobby finish, the concierge, or the brand of the developer. These influence resale price, but not risk in the operational sense. A famous developer's name on the building does not fund the reserve. The owners do.

We also do not treat tower vs. low-rise as a risk category by itself. Towers have higher absolute repair costs and more complex systems (elevators, mechanical parking, façade access). That is reflected in their long-term plan. The question is whether the reserve matches the plan — same question as for any other building.

This is not investment advice. The final decision is yours.

For a structured second opinion on a specific Tokyo condo, see RE : public.