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NEDO, operating under METI's Green Innovation Fund, opened a new sub-track of its "Development of Next-Generation Solar Cells" programme specifically for tandem (perovskite-on-silicon) mass-production technology, distinct from the "Next-Generation Solar Cell Demonstration Project" sub-track that selected three companies in September 2025 (2025-09-10-japan-nedo-next-generation-solar-cell-demonstration-project, JPY 37.8bn). This newer tandem-specific sub-track carries a substantially larger budget — JPY 153.3 billion maximum, with JPY 123.2 billion committed for the initial three-year phase, running fiscal 2025 through 2030 (six years). Two companies were selected: Kaneka Corporation (combining a perovskite top cell with its own heterojunction crystalline-silicon bottom cell, targeting FY2028 commercial sales) and Aisin Corp. Eligibility required a company-held mass-production concept exceeding 500MW by fiscal 2030 — more than double the 200-300MW threshold set for the September 2025 sub-track. Funded work covers manufacturing-process R&D (high-yield, high-throughput scaling) plus demonstration testing under real-world conditions (rooftop and ground-mounted installations).
JPY 123.2bn committed for the first three-year phase — roughly 4x the budget of the September 2025 sibling sub-track (JPY 37.8bn) under the same NEDO programme.
mass-production (vs. general next-gen solar-cell demonstration) signals NEDO/METI escalating from R&D-stage subsidy to production-scale industrial policy, with a 500MW+ per-company production threshold for eligibility.
mechanism (no tariff, export control, or market-access condition) — impact is industrial-policy competitiveness-building, not a direct trade barrier.
Demonstration Project" sub-track — together they represent NEDO running parallel funding tracks for standard next-gen perovskite cells (200-300MW threshold) and tandem perovskite-silicon cells (500MW+ threshold), suggesting NEDO is now funding the transition from lab/pilot scale toward GW-class manufacturing.
manufacturing (see western-industrial-policy-stack), aimed at establishing non-Chinese perovskite-tandem manufacturing capacity as China dominates conventional crystalline-silicon cell and module production.
the 30%+ efficiency / JPY 12/kWh cost targets are achievable at the 500MW+ scale this sub-track funds.
GTA sign-in wall; not independently confirmed beyond the queue bullet's partial list (China, Germany, Republic of Korea).
(Kaneka's FY2028 target was disclosed in its own press release; Aisin's was not located).