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Program Selection & Proposal
We select the optimal subsidy program based on building use, size, new/existing, and public/private ownership, including assessment of selection likelihood.
We handle subsidy programs from the Ministry of Environment, METI, MLIT, MEXT, and MIC. Comprehensive support from application preparation through post-award procedures, inspections, and final reporting.
⚠ Important: Subsidy information on this page is reference material based on FY2026 budget proposal and FY2025 supplementary budget. Rates and requirements may change. Always verify with the latest official guidelines. Actual requirements may differ from descriptions here.
Note: Subsidy program names are shown in their official Japanese titles as designated by the Japanese government.
Select the optimal subsidy based on building conditions. Below is the basic selection flow.
* Basic guide for selecting ZEB subsidy programs. Conditions vary. Always verify with the latest official guidelines.
Based on FY2026 budget proposal and FY2025 supplementary budget.
| Budget | FY2026: ¥6,700M / FY2025 Supp.: ¥4,800M |
|---|---|
| Key Requirements | ZEB Oriented or higher, BPI≤1.0, Standard Input Method BEI calculation, BEMS installation, renewable energy installation, ZEB Leading Owner registration |
| Subsidy Rate |
Non-office: 『ZEB』1/2、Nearly ZEB 1/3、ZEB Ready 1/4 Office: 『ZEB』1/4、Nearly ZEB 1/5、ZEB Ready 1/6 * Under 2,000㎡: ZEB Ready & ZEB Oriented not eligible |
| Max Subsidy | ¥300-500M per building depending on floor area |
| Project Period | Up to 3 fiscal years |
| Notes | Difficult to be selected below Nearly ZEB. Priority for timber use and building-integrated solar panels. |
| Budget | FY2026: ¥6,700M / FY2025 Supp.: ¥4,800M |
|---|---|
| Key Requirements | ZEB Ready or higher, BPI≤1.0, Standard Input Method BEI calculation, BEMS installation, ZEB Leading Owner registration |
| Subsidy Rate |
Non-office: 『ZEB』2/3、Nearly ZEB 2/3、ZEB Ready 2/3 Office: 『ZEB』1/3、Nearly ZEB 1/3、ZEB Ready 1/3 |
| Max Subsidy | ¥300-500M per building depending on floor area |
| Project Period | Up to 3 fiscal years |
| Notes | Difficult to be selected below Nearly ZEB. Bonus points for renewable energy use, etc. must be accumulated. |
| Key Requirements | ZEB Planner involvement, BEI calculation, disclosure of technical/design/cost data |
|---|---|
| Subsidy Rate | 1/2 (max ¥1M) |
| Project Period | Up to 3 fiscal years |
| Notes | Supports ZEB feasibility study costs. Reports can be used for next year retrofit subsidy applications. |
| Key Requirements | LCCO₂ calculation, ZEB Oriented or higher, BPI≤1.0, Standard Input Method BEI, BEMS & solar installation |
|---|---|
| Subsidy Rate | Non-office: 『ZEB』55%、Nearly 38%、Ready 30%、Oriented 30% Office: 『ZEB』30%、Nearly 25%、Ready 21% |
| Max Subsidy | ¥500M |
| Notes | LCCO₂ calculation required. Additional subsidy for EV charging/discharging equipment sets. |
| Key Requirements | LCCO₂ Reduction requirements + use of low-carbon materials (steel, concrete, wood, etc.) |
|---|---|
| Subsidy Rate | Same as LCCO₂ Reduction type ('ZEB' 55%, etc.) |
| Max Subsidy | ¥500M |
| Budget | FY2026: ¥4,000M |
|---|---|
| Key Requirements | Post-retrofit BPI≤1.0, 30-40%+ reduction vs. energy code (ZEB level), energy management & operational improvement |
| Eligible Costs | Insulation windows/materials, high-efficiency HVAC/lighting/hot water (exceeding Top Runner standards), etc. |
| Subsidy Rate | Insulation: flat rate (~1/2), HVAC/lighting/hot water/BEMS: 1/3 |
| Notes | BEMS installation mandatory. Multi-year construction possible. |
| Budget | FY2026: ¥27,018M / FY2025 Supp.: ¥33,500M |
|---|---|
| Leading Decarbonization Areas | Rate: generally 2/3 / Max ¥500M/building (¥300M under 2,000㎡) |
| Priority Measures Acceleration | New: 'ZEB' 1/2, Nearly 1/3, Ready/Oriented 1/4 Existing: up to 2/3 / Max ¥500M/building |
| Project Period | Approximately 5 fiscal years |
| Notes | Requires municipal selection as a leading decarbonization area or priority acceleration project. High selection threshold. |
| Budget | FY2026: ¥4,559M (new) |
|---|---|
| Key Requirements | ZEB Oriented or higher, new ≥10,000㎡ / existing ≥2,000㎡, BPI≤1.0, Standard Input Method BEI, BEMS installation |
| Subsidy Rate | New construction ZEB: up to 1/3 / Existing ZEB: up to 1/2 / Unrated technology: up to 1/2 |
| Max Subsidy | ¥500M (single year) / ¥1B (multi-year) |
| Project Period | FY2026-FY2030 (5 years) |
| Notes | Ductwork, piping, power wiring, and indirect costs not eligible, so subsidy amounts tend to be lower. |
| Budget | FY2026: ¥113M (new) |
|---|---|
| Key Requirements | ZEB diagnosis and retrofit plan development for existing buildings |
| Subsidy Rate | 1/2 |
| Project Period | FY2026-FY2030 (5 years) |
| Budget | Initial: ¥84B / Supp.: ¥55B (GX) |
|---|---|
| Type Ⅰ | Major facility-wide energy savings (30%+). Rate: 1/2 (SME) / 1/3 (large). Max ¥1.5B. |
| Type Ⅱ | Electrification / low-carbon fuel conversion. Rate: up to 1/2. Max ¥300-500M. |
| Type Ⅳ | EMS installation. Rate: 1/2 (SME) / 1/3 (large). Max ¥100M. |
| Notes | Payback period requirement (5+ years, etc.). New supply chain collaboration category established. |
| Budget | Initial: ¥5B / Supp.: ¥12.5B |
|---|---|
| Type Ⅲ | High-efficiency equipment from approved list. Rate: up to 1/3. Max ¥100M. |
| GX Type Ⅲ | Top Performance: upgrade 1/2 (SME) / 1/3 (large), new 1/3 (SME) / 1/5 (large). Max ¥300M. |
| Notes | GX Type Ⅲ: new installations also newly eligible (from FY2025 supplementary budget). |
| Budget | FY2026: Part of ¥3,602M |
|---|---|
| Key Requirements | ZEB Oriented or higher, introduction of leading technology, CASBEE certification |
| Subsidy Rate | 1/2, etc. |
| Max Subsidy | ¥300M per project in principle |
| Notes | Must combine "innovation" with "scalability and dissemination potential." |
| Key Requirements | Must include envelope renovation, 20%+ energy savings vs. pre-retrofit, BELS certification, seismic safety |
|---|---|
| Subsidy Rate | 1/3 |
| Max Subsidy | ¥50M (equipment ¥25M) + barrier-free ¥25M |
| Notes | Single-year program; not suitable for large-scale projects. |
| Budget | FY2026: ¥70,660M / FY2025 Supp.: ¥8,466M |
|---|---|
| Subsidy Rate | 1/2 (within urban function induction zones, etc.) |
| ZEB Bonus | ZEB Ready compliance increases max eligible project cost from ¥2.1B to ¥3B |
| Notes | Requires publication of Location Optimization Plan and Urban Renewal Plan. |
| Budget | FY2026: ¥67.8B / FY2025 Supp.: ¥255.2B |
|---|---|
| Subsidy Rate | New/expansion: 1/2 / Renovation: 1/3 |
| Notes | Available for promoting ZEB in school facilities. |
| Budget | FY2026: ¥90B |
|---|---|
| Allocation Rate | 90% |
| Tax Allocation | ZEB: 50% / Individual energy code compliance retrofit: 30% |
| Notes | Extended to FY2030. Individual equipment retrofits (HVAC, etc.) also newly eligible. |
| Budget | FY2026: ¥610B |
|---|---|
| Allocation Rate | 100% |
| Tax Allocation | Decarbonization promotion special category: 70% |
| Notes | Especially advantageous for depopulated municipalities. ZEB projects prioritized as "decarbonization special category." |
One-stop support from program selection through application, post-award administration, and final reporting.
We select the optimal subsidy program based on building use, size, new/existing, and public/private ownership, including assessment of selection likelihood.
We support preparation of application documents including BEI calculations, equipment specifications, and economic analysis. We also propose strategies for accumulating bonus points.
We support all administrative procedures from grant application, interim inspections, design change procedures, inspection attendance, to final report preparation.
Please share the building use, floor area, location, new/existing, and public/private status. We will recommend the best program. Feel free to contact us for an initial consultation.
Yes. We accept partial requests such as application support only or BEI calculation only.
Even if not selected, we propose alternatives such as reapplication the following year or switching to a different program to achieve ZEB goals.
In principle, duplicate subsidies for the same project are not permitted, but combinations such as subsidies with municipal bonds may be possible. Please consult for details.
Yes. Subsidy rates, maximum amounts, and requirements may change annually. We continuously gather the latest information to provide optimal recommendations.
Tell us your building use and size, and we'll recommend the best subsidy program.