Subsidy programs are run by Japanese municipalities, and their pages are in Japanese. Most require residency or registration in the town.
Mirai Eco Housing 2026 Program (Renovation)RenovationMax ¥1M
Nationwide・FY2026・Applications accepted until December 31, 2026 (reservations until November 16; ends when budget limit reached)
Fixed subsidy for energy-saving renovations such as insulation upgrades. Up to ¥400K–¥1M per unit (depending on construction date and scope of work)
Conditions: In principle, houses built on or before December 31, 2016. Applications filed by registered contractors and rebated to owners. Cannot be combined with other subsidies using national funds
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Existing Housing Insulation Renovation Support ProjectRenovationMax ¥1.2M33%
Nationwide・FY2026
1/3 for insulation renovation of existing housing (total insulation or living room only). Detached: cap ¥1.2M; multi-unit: ¥150K per unit
Conditions: Homeowners, etc. Total insulation requires 15%+ heating/cooling energy reduction. FY2026–2028 project
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Decarbonization Renovation Acceleration Project for Commercial Buildings (Decarbonized Building Renovation)RenovationMax ¥1B
Nationwide・FY2026・June 4, 2026 – November 30, 2026
1/2–1/3 for renovation of existing commercial buildings (schools, hotels, etc.) with insulated windows, insulation, high-efficiency HVAC, LED, etc. Cap ¥1B
Conditions: Requires 30% (hotels, restaurants, etc.) or 40% (offices, schools, etc.) energy savings by use. Minimum ¥2M. Ends when budget exhausted
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Akiya Countermeasures Model Project (Hard Infrastructure)Renovation33%
Nationwide・FY2026・April 20, 2026 – May 20, 2026
Direct national subsidy for high-model akiya countermeasures by NPOs/private businesses. 1/3 of renovation costs, 2/5 of demolition costs
Conditions: Must be selected through MLIT proposal call (requires model nature in renovation/demolition technology, methods, construction processes, etc.). Project runs through FY2026
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Comprehensive vacant house countermeasures program / Vacant house revitalization promotion program (utilization)Renovation67%
Nationwide・FY2026・Set by each municipality
Subsidy for renovating vacant houses for community revitalization use of 10+ years: national 1/3, municipality 1/3 (owner bears 1/3)
Conditions: Apply via municipality (only municipalities with vacant house countermeasure plans that have established subsidy systems under this program). Actual rate and cap depend on municipal system
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CO2 Reduction Renovation Support Project for AkiyaRenovationMax ¥10M33%
Nationwide・FY2026
1/3 for CO2 reduction through high-efficiency equipment when renovating akiya into commercial facilities. Cap ¥10M
Conditions: Local governments, private businesses, organizations, etc. Requires specified CO2 reduction and operational improvement measures
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ZEB and CO2 Reduction Promotion Acceleration Project for Buildings (ZEB Conversion of Existing Buildings)Renovation
Nationwide・FY2026
1/3–2/3 subsidy for ZEB conversion renovation of existing commercial buildings, based on floor area, use, and ZEB rank (cap ¥300M–¥500M)
Conditions: Private businesses: existing buildings <2,000㎡, must achieve ZEB or Nearly ZEB. Schools, hotels, etc. (non-office): 2/3 or 1/2
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Pre-school Education and Childcare Facility Development Grant (Nursery School, etc. Development)Renovation75%
Nationwide・FY2026・Set by each municipality
Subsidy for new construction, repair, renovation, etc. of private nursery schools and certified centers for early childhood education and care. National 1/2, municipality 1/4 (operator bears 1/4)
Conditions: Applications via municipality (based on municipal development plan). Operators: social welfare corporations, school corporations, or those approved by municipality. Increased to 2/3 national for waiting list and depopulation countermeasures
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Advanced Window Renovation 2026 ProgramRenovationMax ¥1M
Nationwide・FY2026・Applications accepted until December 31, 2026 (reservations until November 16; ends when budget limit reached)
Fixed subsidy for insulated window upgrades including interior windows, exterior window replacement, and glass replacement. Up to ¥1M per residential unit; up to ¥10M per non-residential building
Conditions: Work must use registered products. Applications filed by registered contractors (window renovation contractors). Non-residential: up to ¥1M for floor area ≤240㎡; up to ¥10M for >240㎡
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Agricultural, Mountain and Fishing Village Promotion Grant (Farm Stay Type - Facility Development)RenovationMax ¥25M50%
Nationwide・FY2026・January 23, 2026 – February 12, 2026 (additional call: June 15, 2026 – July 2, 2026)
1/2 of costs to renovate old farmhouses, closed schools, etc. into lodging/stay facilities. Cap ¥25M (up to ¥50M for idle facility renovation)
Conditions: Implemented by regional councils/core organizations (private companies possible; council organization required). Must provide lodging, dining, and experiences. Municipal idle assets: cap ¥75M
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Comprehensive Childcare Support Program Subsidy (Support for Renovation Costs of Nursery Schools, etc. in Rental Properties)RenovationMax ¥73.2M75%
Nationwide・FY2026・Set by each municipality
Subsidy for renovation costs to open or expand capacity of nursery schools, etc. in rental properties. Standard amount per facility: ¥19.97M–¥73.22M depending on capacity
Conditions: Applications via municipality (implementing body: municipality). National 1/2, municipality 1/4 (operator bears 1/4). Fixed-term lease properties ineligible
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Ayagawa Town Akiya Remodeling GrantRenovationMax ¥1M50%
Ayagawa Town, Kagawa・Must be completed within application fiscal year
Subsidizes 1/2 of remodeling costs for akiya bank properties (max ¥1M)
Conditions: Property listed on the Akiya Bank. Registration and residence required for 3+ years. Sale/rental to relatives within 3rd degree prohibited.
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FY2026 Sakaide City Migration Promotion/Akiya Renovation SubsidyRenovationMax ¥2M50%
Sakaide City, Kagawa・FY2026・Performance report due within 30 days of work completion or by January 31, whichever is earlier
Grants for renovation costs of akiya bank properties. For migrants and prospective migrants.
Conditions: Migrant from outside prefecture. Purchase or lease akiya bank property. Within 6 months of contract. Intent to reside 3+ years.
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Akiya Renovation Support Project SubsidyRenovationMax ¥1M
Tonosho Town, Kagawa・Year-round acceptance (applications accepted anytime)
Akiya Bank property renovation costs. Full amount up to ¥500K, 50% of excess (max ¥1M)
Conditions: Akiya Bank registrant or immigrant within 1 year of resident registration. Work by local contractors. Renovation targets: equipment, interior/exterior walls, etc.
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Subsidy terms change every fiscal year. Always confirm with the municipality before applying.