Chiba Prefecture's household subsidies work differently from other prefectures. For the 2026 fiscal year (Reiwa 8): first, the prefecture pays residents directly only when the equipment is leased or provided under a PPA — buy it and the prefecture pays nothing. Second, if you buy, your counter is the municipality, and the prefecture funds those municipalities. Third, the V2H item on that menu — one-tenth of eligible costs, capped at ¥250,000 — is among the most generous in Japan. If you looked at the prefecture's website and could not find a programme you qualify for, this structure is why. Here is how prefectural, municipal, and national programmes fit together, from primary sources.
In Chiba, buying and leasing lead to entirely different programmes
Direct prefectural subsidy (lease/PPA only)
The Residential Solar Lease Promotion Project. ¥70,000/kW for solar (under 10kW) plus ¥120,000 for a battery. Purchase contracts are excluded.
Your counter is the municipality
The Residential Equipment Decarbonisation Promotion Subsidy. The prefecture does not grant money to residents directly; participating municipalities are the application counter.
One-tenth of costs, capped at ¥250,000
A shared menu item in Chiba City, Funabashi City, Yachiyo City and others. Requires solar and a next-generation vehicle. Separate from the national subsidy.
Chiba Prefecture "grants subsidies to municipalities that run the subsidy programme" and states explicitly that it does not grant subsidies directly to the person installing the equipment. Residents apply through their municipality. In FY2025, 54 municipalities appeared on the list. Reading amounts off the prefectural page and assuming your city offers them can leave you empty-handed, because not every municipality participates. Start by checking whether your own municipality runs the programme.
The only direct prefectural programme: ¥70,000/kW if you lease
The prefecture's only direct subsidy to residents is the FY2026 Chiba Residential Solar Lease Promotion Project, aimed at people choosing a zero-upfront-cost arrangement, run by inviting installation plans.
| Item | Details |
|---|---|
| Solar PV | Output (kW) × ¥70,000 |
| Storage battery | ¥120,000 |
| How it is introduced | Lease or PPA (purchase contracts excluded) |
| Requirements | Solar and a battery installed as a set. Solar output under 10kW |
| Application window | 7 May 2026 to 30 October 2026 |
While municipal subsidies run to late January or February, the prefecture's lease programme closes on 30 October 2026. If you are considering zero-upfront solar, that is your effective deadline. Separately, Chiba Prefecture also runs a group purchasing support scheme in which the prefecture aggregates buyers to lower prices — that is a discount, not a subsidy.
If you buy: the municipal Residential Equipment Decarbonisation Promotion Subsidy
This is what buyers use. Because municipalities follow a menu set by the prefecture, amounts are fairly consistent across cities. Eligible equipment for individuals: Ene-Farm, stationary lithium-ion batteries, window insulation renovation, electric vehicles, plug-in hybrids, and V2H charging/discharging equipment.
| Equipment | Chiba City | Funabashi City | Yachiyo City |
|---|---|---|---|
| Solar PV | ¥10,000/kW (capped at ¥45,000, existing homes only) | ¥15,000/kW (capped at ¥60,000, with a battery or HEMS) | — |
| Stationary lithium-ion battery | ¥70,000 | ¥70,000 (with solar) | ¥70,000 |
| Ene-Farm | ¥100,000 | ¥100,000 (with blackout operation) | ¥100,000 |
| Window insulation renovation | One-quarter of costs (capped at ¥80,000, existing homes only) | — | One-quarter of costs (capped at ¥80,000) |
| V2H equipment | One-tenth of costs (capped at ¥250,000) | One-tenth of costs (capped at ¥250,000) | One-tenth of costs (capped at ¥250,000) |
| EV / PHV | ¥150,000 with solar and V2H / ¥100,000 with solar only | ¥150,000 with solar and V2H / ¥100,000 with solar only | ¥150,000 with solar and V2H / ¥100,000 with solar only |
| ZEH+ | ¥100,000 | — | — |
| Application window | 1 May 2026 to 29 January 2027 | 1 May 2026 to 26 February 2027 | 15 April 2026 to 29 January 2027 |
The prefecture's shared menu covers batteries, V2H, EVs and so on; solar itself is a municipal add-on. Funabashi pays ¥15,000/kW (capped at ¥60,000), Chiba City ¥10,000/kW (capped at ¥45,000, existing homes only), and Yachiyo has no solar item at all. Rather than comparing cities on the solar amount, secure the battery and V2H money — that is the Chiba way of thinking.
Chiba City publishes its planned numbers: about 460 for batteries, 200 for solar, 20 for V2H, and 70 for EVs and PHVs combined. There are only around 20 V2H slots. Applications are first-come, first-served, with a lottery if same-day applications exceed the budget. Chiba City's next-generation vehicle and V2H subsidies are also applied for after the work is complete (corporations excluded; four-wheel passenger cars only), so it is entirely possible to install and then find the slots gone. Check remaining capacity before starting work.
V2H in Chiba: combine the city's ¥250,000 with the national subsidy
One-tenth of eligible costs, capped at ¥250,000, is generous by national standards. There are conditions.
- You need both a solar PV system and a next-generation vehicle (EV, PHV, and so on). V2H on its own cannot be submitted
- The EV/PHV subsidy is ¥100,000 with solar only and ¥150,000 with solar plus V2H, so adding V2H also raises the vehicle side by ¥50,000
- The national charging infrastructure subsidy (FY2025 supplementary) also has a V2H window: for a private home, up to ¥750,000 for the unit plus up to ¥550,000 for installation. Grant applications are expected from July to September 2026, with conditions including agreeing to provide installation data to national and local government and to cooperate if asked during a disaster
V2H: ¥2,000,000 × 1/10 = ¥200,000 (within the ¥250,000 cap)
EV: ¥150,000 with solar and V2H
Adding a battery: ¥70,000
= ¥420,000 from the city alone (national V2H and CEV subsidies are separate)
National programmes: the battery DR subsidy has closed; V2H is open
| National programme | Status as of August 2026 |
|---|---|
| Charging infrastructure subsidy (V2H) | Up to ¥750,000 for the unit plus up to ¥550,000 for installation — around ¥1.3 million for a private home. Grant applications expected July to September 2026 |
| DR home battery programme (FY2025 supplementary, capped at ¥600,000) | Closed on 29 May 2026 when the budget was exhausted; the implementing body has stated it will not reopen applications |
| Housing Energy-Saving 2026 Campaign | Three ministries jointly running Advanced Window Renovation 2026, Water Heater Energy-Saving 2026, and Mirai Eco Housing 2026 (successor to the Child-Rearing Green Housing Support Project) |
For window insulation renovation, Chiba City deducts any national subsidy received. If you use Advanced Window Renovation 2026, the city's ¥80,000 is not simply added on top.
Summary: how to move in Chiba
Is the subsidy taxable?
A subsidy an individual receives for their own home is occasional income, with an annual special deduction of ¥500,000; half of any excess is added to your other income and taxed. In Chiba, ¥250,000 for V2H plus ¥150,000 for an EV plus ¥70,000 for a battery already approaches ¥500,000 from the city alone, and adding the national V2H subsidy pushes you over for certain.
If you acquire a fixed asset (solar panels, a battery, V2H equipment) using a national or local government subsidy, attaching the "Statement Concerning Exclusion of National Treasury Subsidies from Gross Revenue" to your tax return keeps the subsidy used to acquire the asset out of gross revenue. This applies to private individuals, not only businesses.
- Spreading receipts across years (battery this year, V2H and EV next year) also helps you stay within each year's ¥500,000 deduction
- Sole proprietors installing for business use record it as miscellaneous revenue in business income; corporations record it as taxable income
- Residential solar under 10kW on your own roof is generally outside fixed asset tax (depreciable asset tax)
- With a lease or PPA you do not own the equipment, so the subsidy goes to the provider. It is not your occasional income — but the equipment is not yours either
Frequently asked questions
Q. How much is Chiba Prefecture's solar and battery subsidy?
A. The prefecture grants directly to residents only for lease or PPA arrangements: ¥70,000 per kW for solar and ¥120,000 for a battery (applications 7 May to 30 October 2026). If you buy, the counter is your municipality's Residential Equipment Decarbonisation Promotion Subsidy, with a shared menu including ¥70,000 for a battery and ¥100,000 for Ene-Farm. Solar itself is a municipal add-on: ¥15,000/kW (capped at ¥60,000) in Funabashi, ¥10,000/kW (capped at ¥45,000) in Chiba City.
Q. How much is the V2H subsidy in Chiba Prefecture?
A. Under the municipal Residential Equipment Decarbonisation Promotion Subsidy, one-tenth of eligible costs capped at ¥250,000 (shared by Chiba City, Funabashi City, Yachiyo City and others). Solar PV and a next-generation vehicle are required; V2H alone cannot be submitted. The national charging infrastructure subsidy — up to ¥750,000 for the unit plus ¥550,000 for installation for a private home — can also be considered.
Q. I cannot find a subsidy on the prefecture's website.
A. Chiba Prefecture grants subsidies to municipalities that run the programme and does not grant directly to the person installing the equipment. Applications go through each municipality, and not all municipalities participate, so start by checking your own.
Q. Is buying or leasing (zero-upfront solar) better?
A. On subsidies alone, the prefecture's lease programme has higher unit amounts (¥70,000/kW for solar plus ¥120,000 for a battery), but you never own the equipment. If you buy, you can combine the municipal subsidy with V2H and EV subsidies, and the feed-in revenue and residual value of the equipment are yours. It comes down to whether you can fund the upfront cost and how many years you plan to use the roof.
Q. Is the subsidy taxable?
A. A subsidy received by an individual for their own home is occasional income, with an annual special deduction of ¥500,000. However, attaching the "Statement Concerning Exclusion of National Treasury Subsidies from Gross Revenue" to your tax return excludes the subsidy used to acquire the equipment from gross revenue (Income Tax Act, Article 42). A year in which you install V2H, an EV and a battery together will easily exceed ¥500,000, so check this provision.
Sources
This article is based on the following public sources. Amounts, caps, and application status change with the fiscal year and budget consumption. Always check the official sites and guidelines before applying.
*This article is for information only and is not tax or application advice. Amounts, requirements, and application status are as of August 2026 and programmes may close early once budgets are exhausted. Confirm individual cases with the relevant subsidy office, a tax office, or a licensed tax accountant.