In the early stages of a hotel development study, zoning, floor-area ratio and the parking-provision requirement always get checked. There is one more condition beyond them, in force since April 2025: the EV charging equipment installation mandate Tokyo imposes on new buildings. It comes from a revision to the Tokyo Metropolitan Ordinance on Environmental Preservation (the Environmental Security Ordinance), passed by the Metropolitan Assembly in December 2022, and it reaches new construction with a total floor area of 2,000 m² or more through the Tokyo Green Building Program.

What makes this mandate unusual is that it is triggered not by floor area or room count but by the number of parking spaces. The number of spaces required under the parking ordinance directly determines whether chargers are needed and how many. This article first confirms Tokyo’s installation standard against primary sources, then works backwards from our building-plan data and the parking ordinance unit rate to answer the question of what room count brings a hotel into scope, and costs out the three Capex layers — chargers, pre-installed conduit and incoming power capacity — for 100-room and 300-room models. Taking subsidies and charging revenue in as well, the aim is to quantify one more layer of development cost: electrical infrastructure.

A mandate triggered by parking spaces, not floor area

Tokyo’s Metropolitan Assembly passed the revision to the Environmental Security Ordinance on 15 December 2022, making solar generation equipment and EV charging equipment part of the rules for new buildings. Both took effect in April 2025. We have covered the solar side before; the charging side is often still missing from development planning templates.

What applies to large new buildings of 2,000 m² or more is the EV charging equipment installation standard under the Tokyo Green Building Program, and the requirement splits in two depending on the character of the parking. That split is the practical dividing line.

Source: Tokyo Metropolitan Government Bureau of Environment, Guideline on the EV Charging Equipment Installation Standard under the Tokyo Green Building Program (1st edition, March 2024) / Tokyo Metropolitan Ordinance on Environmental Preservation. The guideline is split by submission period: the 1st edition applies to submissions from April 2025 to March 2026, the 2nd edition to submissions from April 2026 onward.

The rule is often described as chargers on 20% of the parking, but the 20% applies to dedicated parking. Hotel guest parking, with its shifting mix of vehicles and short stays, is classified as shared parking: at 10 spaces or more, at least one charger is required, plus pre-installed conduit for 20% or more of the spaces. Where contracted spaces are allocated to employees or company vehicles, the 20% rule kicks in once those spaces number five or more. In other words, two standards run in parallel inside the same building.

Below 2,000 m², a separate track applies: the Green Building Report Program, also in force since April 2025. It covers designated suppliers that deliver 20,000 m² or more of small and mid-sized new buildings in Tokyo per year, and the obligation attaches to the supplier rather than to the individual building. Chains that keep delivering compact hotels in Tokyo should note they may fall within its reach.

We also checked other local governments. Kawasaki has run a solar generation programme since April 2025, but within the scope of this study we found no programme setting a numerical requirement for charger counts. Nagano Prefecture asks new buildings of 10,000 m² or more to consider installing renewable energy equipment, but that is a duty to consider, not to install. On numerical charger requirements for new buildings, Tokyo is ahead of the field at this point. For developers working in Kyoto or Osaka, the near-term question is mainly which subsidies to use.

At what room count does a hotel enter scope — working back from the parking requirement

Whether chargers are required is decided by the number of parking spaces. So what decides a hotel’s parking space count? In Tokyo, the provision requirement under the Tokyo Metropolitan Parking Ordinance effectively sets the floor. In parking improvement districts and similar areas, the unit rate for hotels and ryokan is one space per 300 m² (we compared seven cities on this point in earlier work: hotel parking provision requirements differ by a factor of 2.5 across cities).

Using the same assumptions as that study (300 rooms, 7,500 m² total floor area, or 25 m² per room) and assuming the number of spaces actually provided equals the required number, we tested where the mandate bites by property size. Ten shared-parking spaces is the dividing line.

Source: compiled by MetroEngines Research & Consulting from the Tokyo Metropolitan Parking Ordinance and the Bureau of Environment installation standard

Assumes 25 m² of floor area per room and that required spaces equal the spaces actually provided. Below 6,000 m² the ordinance relief formula applies, rounded up. The provision requirement covers parking improvement districts, commercial zones, neighbourhood commercial zones and similar areas. Source: compiled by MetroEngines Research & Consulting from the Tokyo Metropolitan Parking Ordinance and the Bureau of Environment

Solving the threshold precisely means folding in the relief formula that applies below 6,000 m². For a hotel-only building the required space count is (4 × total floor area − 6,000) ÷ 900, so rounding up, it reaches 10 spaces at a total floor area above 3,525 m² — at 25 m² per room, about 140 rooms. Under the current standard, a new hotel above roughly 140 rooms in a central Tokyo commercial district triggers the charger installation requirement. A 100-room property stops at five spaces thanks to the relief formula and stays outside scope.

Worth watching here is the Basic Approach to Revising the Tokyo Metropolitan Parking Ordinance (draft), published by the Bureau of Urban Development on 8 June 2026. It would ease the unit rate for other designated uses, a category that includes hotels, from 300 m² per space to 450 m² per space, and public comment ran to 8 July of the same year (the ordinance revision has not been enacted). If it goes through, the lower required space count means the charging mandate’s trigger point also moves back from about 140 rooms to about 180 rooms. Because the parking ordinance and the charging mandate are numerically linked, easing one eases the other. Projects filing for building confirmation in 2026 and 2027 will be planned while both rules are in motion — worth pinning down at the planning stage.

All 18 planned Tokyo projects exceed 2,000 m²

Extracting planned and under-construction projects that include a hotel in Tokyo from the building-plan data we maintain from the Ministry of Land, Infrastructure, Transport and Tourism’s Statistical Survey on Building Construction Starts gives 18 projects and 3,497 rooms (after de-duplication, as of the survey date). Of these, all 18 are at 2,000 m² or more, putting them within the Tokyo Green Building Program’s scope. Nationwide, 62 of 69 projects (89.9%) were at 2,000 m² or more.

By ward, Chiyoda leads with 5 projects and 728 rooms, followed by Shibuya with 3 projects and 461 rooms and Minato with 2 projects and 417 rooms. Projects in Chiyoda, Minato, Chuo and Shinagawa include mixed-use redevelopments with office and retail space running to several hundred thousand square metres, where charger placement is decided within the whole building’s parking plan rather than the hotel portion alone.

Markers are placed at ward office locations as an approximate ward-level display, not the exact site of each project. Circle size is the total planned room count in that ward. Source: compiled by MetroEngines Research & Consulting from the Ministry of Land, Infrastructure, Transport and Tourism’s Statistical Survey on Building Construction Starts (N=18 projects)

Separately, for the nine Tokyo projects that are hotel-only and have a reported total floor area, applying the current unit rate and the relief formula gives required space counts of 4.8 to 19.8 spaces. Six of the nine reach 10 or more once rounded up. That said, floor areas in building-plan data are as filed, and the actual required count moves with how the parking portion is treated and which relief measures apply. Determinations on individual projects presuppose consultation with the competent authority.

Capex splits into three layers

Charging Capex cannot be expressed as a single number. Stacking it in three layers — (1) the chargers themselves, (2) pre-installed conduit, (3) incoming power capacity — shows where the range comes from.

(1) Chargers. Material submitted by the Bureau of Urban Development to the parking ordinance review committee (based on operator interviews) puts the initial cost of a fast charger at about ¥2 million to ¥3 million per unit, with a service life of about eight years. What is realistic for hotel guests is a 6 kW standard charger used during the stay, where equipment and installation together run from several hundred thousand yen up to around ¥2 million in difficult conditions. Tokyo’s subsidy caps installation work for the first standard charger at ¥1.35 million, which gives a sense of the ceiling on the works side.

(2) Conduit. Installing conduit routes, wiring and distribution-board headroom at the same time as new construction adds ¥10,000 to ¥40,000 per space. That is far cheaper than retrofitting — opening walls, adding distribution boards, redoing buried conduit — so running conduit to more spaces than the mandate requires compresses later Capex. The 300-room model needs 8 spaces (5 shared plus 3 dedicated), but running conduit to all 25 spaces adds only a few hundred thousand yen.

(3) Incoming power capacity. This is what sets the width of the range. Load density in hotel electrical design generally runs 50 to 80 VA/m², so a 300-room, 7,500 m² building implies 375–600 kVA of substation capacity. Adding 6 kW × 2 units, or 12 kW, to that is only 2.0–3.2% of the incoming capacity, which usually sits inside normal design headroom. The problem case is converting all eight mandated conduit spaces to chargers in future: at 48 kW the ratio rises to 8–13%. If the design was laid out without headroom, transformers or the cubicle substation have to be upsized, and unit prices of ¥8 million to ¥15 million for 300–500 kVA class equipment — around ¥15 million for a full replacement job — come into view.

Source: compiled by MetroEngines Research & Consulting from Tokyo Metropolitan Government Bureau of Urban Development, Guiding the installation of ZEV chargers under the parking ordinance / Tokyo Metropolitan Environmental Public Service Corporation subsidy programmes / prevailing price ranges for substation equipment

A simplified estimate; an actual investment decision requires a detailed feasibility study. Source: MetroEngines Research & Consulting

Separating where the range comes from shows that what matters is not the amount itself but how incoming power capacity is handled. Below, an optimistic and a mid case that stop at chargers and conduit sit alongside a pessimistic case that includes upsizing the substation.

Straight-line depreciation over 15 years, 80% occupancy (87,600 room-nights a year for 300 rooms). The ADR share is against the trailing-12-month median estimated settled ADR for business hotels in Tokyo of ¥14,100 (N=910 properties). Figures are before subsidies. Source: Tokyo Metropolitan Government Bureau of Urban Development / Tokyo Metropolitan Environmental Public Service Corporation / compiled by MetroEngines Research & Consulting

Laying the per-room-night burden out on two axes — the cost of upsizing capacity and the room count — makes clear that the weight falls hardest on smaller properties. The same ¥15 million of upsizing works out at ¥8.8 per room-night for 500 rooms but ¥29.4 for 150 rooms, a gap of more than three times. The smaller the project, the more it is worth folding the charging load into the load calculation at schematic design.

Chargers plus conduit are fixed at the 300-room model’s high case of ¥4.32M, with size differences reflected only in the depreciation denominator — a conservative treatment. Straight-line depreciation over 15 years, 80% occupancy. The shaded cell matches the ¥14.7 per room-night in the text (300 rooms, ¥15.0M upsizing). Even the heaviest cell, 150 rooms with ¥15.0M, stays at ¥29.4, or 0.21% of the ¥14,100 estimated settled ADR. Source: compiled by MetroEngines Research & Consulting

In short, where no capacity upsizing is required, this mandate’s effect on project viability is very small. Our aggregation puts the trailing-12-month median estimated settled ADR for business hotels in Tokyo at about ¥14,100 (N=910 properties), against which ¥0.6–14.7 per room-night is 0.004% to 0.10% of ADR. Set against the water connection charges we have covered before (a gap of up to ¥5.11 million between municipalities) or the Capex arising from parking provision requirements (¥140,000–350,000 per room), it is an order of magnitude smaller. Rather than the amount itself, at what point it is folded into the substation plan is the design-process question that matches reality.

Running cost is set by the base charge and maintenance

More deserving of attention than Capex is the running cost. The same Bureau of Urban Development material shows, for a fast charger (50 kW output, low-voltage power contract), an electricity base charge of about ¥50,000 a month, or about ¥600,000 a year, network fees of about ¥4,000 to ¥5,000 a month and maintenance and inspection of about ¥300,000 a year — about ¥1 million a year in total, excluding the electricity used for charging. The same material notes that recovering installation costs from charging fees alone is difficult, and that installation does not proceed unless secondary effects such as drawing customers are expected.

That, however, is the figure for a 50 kW fast charger. Scaled proportionally to the two 6 kW standard chargers, or 12 kW, that are central to a hotel’s compliance, the equivalent base charge is only about ¥140,000 a year (our estimate). Adding network fees and maintenance keeps it in the range of a few hundred thousand yen a year, which across 300 rooms and 87,600 room-nights is a few yen per room-night. Whether a fast charger goes in as destination charging is the fork that shifts Opex to a different level.

Source: compiled by MetroEngines Research & Consulting from Tokyo Metropolitan Government Bureau of Urban Development, Guiding the installation of ZEV chargers under the parking ordinance (the 12 kW figures are our estimate, scaled proportionally from prevailing 50 kW values)

How far do subsidies bring the net burden down?

Two tracks of support exist, national and metropolitan. The national subsidy for the introduction of charging and refuelling infrastructure to promote clean energy vehicles is administered by the Next Generation Vehicle Promotion Center, and accommodation facilities are included among eligible sites. For standard chargers, the framework covers up to half of equipment purchase costs and the full installation cost.

Tokyo’s side splits in two: the Charging Equipment Deployment Program (residential), for apartment buildings and municipal public facilities, and the Charging Equipment Deployment Program (business), for retail, office and industrial facilities. Under the latter, half of the purchase cost of a standard charger is covered, installation work is capped at ¥1.35 million for the first unit, and for fast chargers (10 kW or more) and ultra-fast chargers (90 kW or more) the purchase cost is fully covered, with per-model caps, and installation is capped at ¥62,000/kW and ¥80,000/kW respectively. Applications run from 26 June 2026 to 31 March 2027. Which programme category a project falls under is worth confirming with the administering office before applying.

Based on FY2026 published terms. Budgets, application windows and requirements change each fiscal year, so always check the latest application guidelines when applying. Source: Next Generation Vehicle Promotion Center / Tokyo Metropolitan Environmental Public Service Corporation (Cool Net Tokyo)

With subsidies folded in, the two chargers in the 300-room model attract half the purchase cost plus support equivalent to the installation cost, so the net burden in the low case falls to a few hundred thousand yen. Put the other way, the ¥15 million in the case that needs capacity upsizing sits outside subsidy coverage, so most of the net burden is decided on the substation side. Whether the charging load can be folded into the load calculation early in design is exactly what the difference in net burden comes down to.

The revenue side — charging income and capturing EV drivers

So far the cost side, but chargers have revenue potential too. Japan’s EV and PHEV share of new car sales reached 5.48% in June 2026, up 2.57 points from 2.91% a year earlier and a record high. The government targets 100% electrified vehicles in new passenger car sales by 2035 and 300,000 charging points by 2030, including 30,000 public fast chargers. Accommodation facilities are positioned as a principal site for destination charging, and the long dwell times of the business suit 6 kW standard charging. Where EV charging at regional lodgings is concentrated, as seen in guest reviews, is analysed in our earlier work.

A look at charging revenue. Prevailing time-based pricing for standard charging runs around ¥55 per 10 minutes, so a three-hour charge during a stay comes to about ¥990. At one use per unit per day, that is about ¥360,000 a year per unit, or ¥720,000 for two. That exceeds the Opex seen in the previous section (about ¥140,000 of base charge for 12 kW plus network fees and maintenance). Even in a ramp-up period short of one use a day, it covers more than half of Opex.

Value also varies with whether parking itself is valued in the local market. In our map of parking mention rates in guest reviews, Tokyo’s mention rate is a low 2.0%, while regional cities with weak rail connectivity exceed 10%. Building know-how first through Tokyo compliance, then carrying it across to projects in markets where parking is valued is a sensible order for chains. The field also connects to inbound rental-car demand: our analysis of inbound rental-car demand and parking mentions found parking mentioned 2.9 times more often in Traditional Chinese reviews than in English.

Conclusion — a question of design sequence, not amount

Summed up from a development-planning perspective, Tokyo’s EV charging equipment mandate comes to this.

First, the mandate is triggered by parking spaces, not floor area or room count. A hotel’s guest parking is shared parking: at 10 spaces or more, at least one charger and conduit for 20% or more of the spaces are required. The chargers-on-20% line applies to dedicated parking for employees and company vehicles, which comes into scope at five spaces.

Second, working back from the parking provision requirement, a hotel in a central commercial district enters scope at about 140 rooms. If the parking ordinance revision published in June 2026 (unit rate from 300 to 450 m² per space) is enacted, that threshold moves back to about 180 rooms. Because the two rules are numerically linked, projects filing for building confirmation in 2026 and 2027 need to watch both at once.

Third, Capex ranges widely, from ¥780,000 to ¥19.32 million, but the width comes from incoming power capacity. Chargers and conduit together come to ¥780,000–¥4.32 million, or ¥0.6–3.3 per room-night — not a scale that decides viability. Once the substation has to be upsized, however, the figure moves into the ¥15 million class, and that portion falls outside subsidy coverage. The outcome is all but decided when the charging load is folded into the load calculation at schematic design.

Fourth, there is clear upside in running conduit to more spaces than the mandate requires. At ¥10,000 to ¥40,000 per space when installed with new construction, running it to all 25 spaces in the 300-room model adds only a few hundred thousand yen. With the EV share of new car sales rising more than two points a year, it avoids the cost of opening walls and redoing conduit at a later renovation. Leaving future headroom in the substation as well keeps the option of pursuing charging revenue open.

We have quantified the infrastructure costs that tend to fall out of business-plan templates one by one — water connection charges, water and sewer costs, waste disposal costs. Electrical infrastructure is the smallest of them in money terms, yet the layer that gets locked in earliest in design. Noticed just before the confirmation filing, there are no options left; folded into schematic design, it costs a few hundred thousand yen — that asymmetry is precisely why this layer belongs on the planning-stage checklist.

Related Reading

• Parking-Review Ranking Across Car-Dependent Japan + EV Charging Edge
• Rental-Car Inbound: Parking Mentioned 2.9x More in Traditional Chinese
• Hotel Water & Sewer Costs Vary 2.1x by Municipality: ¥7.85mn NOI Gap