Past ¥1 million for refurbishment or 80㎡ for demolition, reporting becomes mandatory

Asbestos-related procedures run on two tracks: the Air Pollution Control Act and the Ordinance on Prevention of Health Impairment due to Asbestos, which sits under the Industrial Safety and Health Act. The two differ in scope and in the authority you report to, but reports go into a single electronic system. According to a Ministry of the Environment press release, the reporting system applies to works starting on or after April 1, 2022 (Reiwa 4). It covers demolition works where “the total floor area subject to demolition is 80㎡ or more”, and refurbishment works and works on structures where “the total contract value is ¥1 million or more (tax included)”. The ministry explains that the system lets you “report to both the prefecture (or equivalent) and the Labour Standards Inspection Office in a single operation”, and the system was designed on the assumption of “around 2 million reports a year”.

The practical implication is clear. For a hotel or ryokan of around 100 rooms, a renovation that includes interior upgrades will almost never come in under a ¥1 million contract. In other words, it is safest to assume that the reporting duty applies as a matter of course once you renovate. On top of that, according to the Ministry of Health, Labour and Welfare’s asbestos information portal, the pre-works survey that the report is based on must “include both a document review of design drawings and similar records and a visual inspection”, and for buildings, since October 2023 the survey must be carried out by someone who meets set requirements, such as a certified building asbestos survey inspector. Survey records must be kept for three years and kept available at the work site.

The rate-limiting step in the schedule is the lead time from survey to contract award. The sequence runs from arranging a qualified inspector, to the site survey, to analysis where needed (sample collection and qualitative analysis), and finally to fixing the construction plan based on the results. So the timeline from the renovation decision to the start of works cannot be fixed until you know whether asbestos is present. If asbestos is found, removal of asbestos-containing insulation and similar materials must be notified at least 14 days before works begin, and after removal a qualified person must also confirm that nothing has been left behind.

It is worth stressing that even Level 3 does not mean “no survey needed”. The reporting duty is triggered by the size of the works, not by whether asbestos is present, and a survey is precisely what is needed to conclude that there is none. From the point of view of whoever plans the renovation, the asbestos survey is not “a cost that arises if something is found” but “a cost that always arises once works go ahead”.

1975 and September 2006 — two lines that split the stock, and the 18,977 properties behind them

Japan’s asbestos regulatory timeline has two cut-offs that matter in practice when reading the hotel and ryokan stock. The first is 1975 (Showa 50), when an amendment to the Ordinance on Prevention of Hazards due to Specified Chemical Substances banned, in principle, spraying work using materials with more than 5% asbestos by weight. Sprayed materials are Level 1, which carry the heaviest removal measures. The second is September 2006. According to the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) asbestos Q&A, “asbestos-containing building materials (those containing more than 0.1% asbestos by weight) have been totally banned from manufacture, use, etc. under the Order for Enforcement of the Industrial Safety and Health Act since September 2006 (Heisei 18)”. Buildings whose construction started after that date should, in principle, contain no asbestos-containing materials.

We applied these two lines to the Japanese lodging properties whose opening year MetroEngines Research tracks. The population is 51,901 properties and approx. 2.136 million rooms with a known opening year (as of September 1, 2026). Because there is a known cluster of records concentrated on one particular opening year, those records are treated as “opening year unknown” and excluded from this count.

Properties that opened in 2006 or earlier number 18,977, with approx. 982k rooms, or 46.0% of the population by room count. Of these, 4,220 properties and approx. 181k rooms (8.5%) opened before 1975, a period when sprayed asbestos was not yet regulated. Compared with the 1981 seismic cut-off in our earlier article (236k rooms, 19.1% of all rooms), the asbestos cut-offs cover a far wider part of the stock. Whether a building needs seismic strengthening and whether it needs an asbestos survey are entirely separate questions. For a view of the opening-year mix itself as renewal potential, broken down by area, see 226k Hotel Rooms in 32 Regional Cities: 42.7% Built Before 1996.

Published statistics on report volumes — no breakdown by building use

On the scale of the system’s operation, the Ministry of the Environment’s press release gives “around 2 million reports a year” as the volume assumed when the system was designed. However, as of our research, we could find no published figures for the actual number of reports submitted to the asbestos pre-works survey reporting system by fiscal year, nor any breakdown by prefecture or by building use (such as lodging). This article therefore does not estimate a report count specific to the lodging industry and uses only the system-wide assumption above.

The fact that no breakdown by use is available itself matters for investment decisions. There is no cross-industry public baseline for how often asbestos is detected in hotel and ryokan renovations. In other words, the engineering report for each individual property is the only source of information, and if that item has not been checked at acquisition, the assumptions behind the renovation plan are not yet fixed at that point.

Three regions with a deep 1970s–80s stock — the room mix in Shizuoka, Gunma and Nagano

The year cut-offs really bite in regions where onsen ryokan and company retreats were built in large numbers from the high-growth era through the late Showa period. Here we take three regions as examples and look at the mix by opening-year band: Shizuoka Prefecture, home to Atami and Ito; Gunma Prefecture, with Kusatsu and Ikaho; and Nagano Prefecture, with Kami-Suwa, Shirahone and others.

By room count, the share opened in 2006 or earlier is 65.4% in Nagano, 62.6% in Gunma and 55.6% in Shizuoka. For reference, Tokyo is at 40.5% and Osaka at 31.8%, so the share of rooms caught by the asbestos cut-offs is 10–30 percentage points higher in onsen regions than in the big cities. Mid-sized onsen ryokan continue to be favored as value-add investment targets, but that same population is also the one where the pre-works survey result is most likely to change the business plan.

A 100-room, 3,500㎡, 40-year-old model — ¥10k–¥570k added per room, payback pushed back by up to 3.5 years

Now we put numbers on it. The model is a 100-room onsen-ryokan-type property with 3,500㎡ of total floor area, 40 years old (construction started around 1986, i.e. in the 1975–2006 band), undergoing a full refresh of guest-room interiors. Since construction started after 1975, Level 1 sprayed asbestos is relatively unlikely, but Level 2 (insulation in machine and boiler rooms, fireproof coating on steel frames) and Level 3 (formed boards and finishing coatings) may remain.

For survey costs, Q41 of the same Q&A sets the national subsidy cap for surveying sprayed materials at “¥250,000 per building in principle”. Starting from that, we set the per-building cost of a document review and on-site visual survey by a qualified inspector, plus sample analysis, at ¥500,000–¥1,500,000 (this is not a published market rate but an assumption of this article, anchored on the subsidy cap above). The removal area is assumed to be 30% of total floor area for Level 3 = 1,050㎡, and 10% for Level 2 = 350㎡.

The add-on per room is about ¥10k in Scenario A, about ¥309k in Scenario B and about ¥570k in Scenario C. Set against the annual capex levels disclosed by listed REITs (¥130k–¥620k per room per year, as covered in our earlier article on REIT capital expenditure), the Scenario C add-on is roughly equivalent to stacking one extra full year of capital expenditure.

Next, we look at how much this add-on moves the payback period. We set the core renovation investment at ¥2 million per room × 100 rooms = ¥200 million. Pre-renovation estimated achieved ADR is set at about ¥19,000 (measured value ¥18,961), the last-12-month average (July 2025 – June 2026) for the ryokan category in Shizuoka, with occupancy of 70% (full-year, a model assumption) and a GOP margin of 20%. After renovation we assume ADR +10%, occupancy of 73% (full-year, same basis) and a GOP margin of 22%. Under these assumptions the renovation adds about ¥25.37 million of GOP a year, and the simple payback period excluding asbestos costs is 7.88 years.

The payback period is pushed back by +0.04 years in Scenario A (effectively negligible), +1.22 years at the Scenario B mid point, +2.25 years at the Scenario C mid point, and +3.49 years at the Scenario C high end. A plan built on 7.88 years becoming 11.38 years is a range that directly raises questions about a fund’s holding-period design and a lender’s repayment term.

Scenario C also adds enclosure and negative-pressure dust extraction, 14-day advance notice, and a post-removal check by a qualified person for any material left behind, so you also need to allow for the number of days by which reopening is delayed. Under the assumptions above, daily GOP is about ¥265k, so a 30-day extension to the works shifts about ¥7.96 million of trading-day profit into the next period, and 45 days about ¥11.95 million. This is a question of when revenue is recognized rather than a cost, but it matters when estimating first-year debt-service capacity (daily GOP is the pre-renovation annual GOP under the assumptions above divided by 365 days. Source: estimates by MetroEngines Research & Consulting).

Where ratings move — concentrated in rooms and cleanliness, with no gap in service or meals

On the cost side alone, renovation is a heavy burden. But once you pin down which ratings a renovation actually moves, it becomes easier to see why the add-on cost is worth bearing. Here we split properties with 10 or more rooms in Shizuoka, Gunma and Nagano into three groups by opening-year band and compared the median guest-review scores by category (limited to properties with 30 or more reviews). No individual properties are identified; only cohort aggregates are used.

The gaps open up in rooms (+0.22), cleanliness (+0.26) and facilities & amenities (+0.19). By contrast, service moves only +0.08 and meals actually −0.01, so they barely move at all. In fact, the group that opened in 1974 or earlier has the highest meals score, at 4.21. In other words, the rating gap that building age can explain is concentrated in the rooms themselves and cleanliness, while service and cuisine, the core value of a ryokan, cannot be explained by building age.

This feeds straight into how a renovation should be designed. The strengths of older properties are built up in cuisine and service, and renovation can be positioned as a way to lift only the parts that tend to score poorly, the rooms and wet areas, without damaging those strengths. Put the other way round, this data shows no way to raise the overall rating without touching the rooms. Even if asbestos handling adds ¥300k–¥570k per room, the investment stays on target as long as the renovation focuses on the rooms and wet areas where the rating gap actually shows up.

Note that this section compares scores between cohorts and does not deal with the number of review mentions. Mention density varies with the version of the analysis method, so the comparison is designed around rating levels rather than changes in counts.

Making it a standard due diligence item

Restated in investment terms, the points above come down to three issues.

In practice, asbestos handling is better treated not as something that eats into renovation returns but as a precondition that determines whether and when a renovation can be carried out. The stock of 4,220 properties and approx. 181k rooms opened before 1975, or 18,977 properties and approx. 982k rooms if extended to 2006, makes up a substantial part of Japan’s hotels and ryokan. With value-add investment opportunities widening across this population, setting out the pre-works survey as a standard item saves reinventing it deal by deal.

Finally, every estimate in this article is a simplified model based on published unit costs and a deflator. Actual costs vary widely with the type and quantity of materials, site conditions and local disposal costs, so any investment decision requires a pre-works survey by a qualified inspector and quotes from contractors.