Japan Sustainable Aviation Fuel (SAF) Market: The Role of Green Hydrogen, Biofuels, and Circular Economy Feedstocks

Three converging pathways

Japan is approaching aviation decarbonization from three converging directions at once, and that layering is what distinguishes the Japan Sustainable Aviation Fuel (SAF) Market from single-pathway markets elsewhere. Refiners are scaling hydroprocessed esters and fatty acids (HEFA) production from waste oils, trading houses and municipalities are formalizing circular economy feedstock collection, and national laboratories are pushing green hydrogen-based e-fuel synthesis toward pilot scale. The Ministry of Land, Infrastructure, Transport and Tourism has set a 10% SAF blending target for international flights by 2030, translating into projected national demand of roughly 1.7 million kiloliters a year, a figure that no single feedstock category can realistically satisfy alone.

Biofuels: the near-term backbone

The biofuel route remains the nearest-term contributor to the Japan Sustainable Aviation Fuel (SAF) Market. Cosmo Energy Holdings began Japan's first domestic SAF production in April at its Sakai refinery, initially processing used cooking oil into roughly 30,000 kiloliters annually, with plans to scale toward 300,000 kiloliters by 2030 through a combination of domestic output and imports from Southeast Asian suppliers. A second Cosmo site at Sakaide is targeting bioethanol-based alcohol-to-jet production by around 2029. Parallel HEFA capacity is advancing at ENEOS Wakayama (roughly 400,000 kiloliters from FY2028), Idemitsu's Yamaguchi and Chiba refineries, and Taiyo Oil's Okinawa project, all anchored to waste fats and used cooking oil rather than virgin crops.

Circular economy feedstocks and collection networks

Circular economy sourcing underpins nearly every one of those biofuel projects, which is why feedstock logistics, not conversion chemistry, is emerging as the binding constraint on the Japan Sustainable Aviation Fuel (SAF) Market. Cosmo Oil has signed municipal collection agreements with Shimonoseki City and, alongside JGC and REVO International, with Sakai City to recycle household used cooking oil into SAF, while ENEOS has partnered with real estate developer Tokyu Land to build dedicated UCO collection networks across residential and commercial properties. Household collection points are also being installed at AEON Mall locations across Osaka Prefecture, reflecting a shift from industrial-scale waste-oil aggregation toward distributed municipal and retail collection to widen the domestic feedstock base.

Green hydrogen and e-fuel: the long-horizon pillar

Green hydrogen-derived e-fuel represents the longer-horizon pillar of the Japan Sustainable Aviation Fuel (SAF) Market and the one furthest from commercial scale. ENEOS reported in March that its Central Technical Research Laboratory in Yokohama had produced synthetic fuel from air-captured carbon dioxide, water, and renewable electricity at its demonstration plant, which has been operating since September 2024 at a modest output of about one barrel, or 159 liters, per day. The New Energy and Industrial Technology Development Organization's Green Innovation Fund is backing a parallel effort targeting an 80% liquid fuel yield rate at pilot scale, roughly 300 barrels a day, by 2030, with independent commercialization envisioned only by 2040, underscoring how far e-fuel technology sits from the 2030 blending deadline.

Policy support and the global backdrop

Government financing is the thread tying these three pathways together. Japan has allocated 340 billion yen, about 2.3 billion dollars, in subsidies over five years to support multiple SAF projects, part of a broader industrial policy that treats the Japan Sustainable Aviation Fuel (SAF) Market as a strategic decarbonization sector rather than a niche fuel category. That funding sits alongside international pressure: the International Civil Aviation Organization's CORSIA scheme aims to stabilize international aviation emissions at 85% of 2019 levels from 2024 onward, while comparable programs in South Korea (a 1% mandate from 2027, rising to 7 to 10% by 2035) and the European Union (up to 70% SAF blending by 2050, with 35 percentage points from synthetic fuel) illustrate the competitive backdrop Japanese refiners are producing into.

Cost: the shared constraint

Cost remains the friction point across all three pathways in the Japan Sustainable Aviation Fuel (SAF) Market. HEFA-based SAF from used cooking oil already competes for feedstock with biodiesel, oleochemical, and animal feed industries, pushing refiners toward imported waste oils with attendant price volatility. E-fuel production, meanwhile, depends on green hydrogen and captured carbon dioxide costs that remain multiples above fossil kerosene, which is why NEDO's roadmap frames 2040 rather than 2030 as the commercialization horizon for synthetic aviation fuel. Bridging that gap will likely require blended sourcing strategies, combining nearer-term HEFA volumes with gradually scaling circular economy collection and long-dated e-fuel offtake agreements, rather than betting on any one pathway to close the supply gap alone.

Outlook toward 2030 and beyond

Looking toward 2030 and beyond, the trajectory of the Japan Sustainable Aviation Fuel (SAF) Market will likely be defined less by any single breakthrough technology and more by how effectively refiners, municipalities, and technology developers sequence these three pathways. Waste-oil HEFA capacity is positioned to carry the bulk of near-term blending targets, circular economy feedstock networks will determine how much of that capacity can run on domestic rather than imported material, and green hydrogen e-fuel stands to become the dominant scalable pathway only after 2040, once cost curves for hydrogen and carbon capture fall further. For now, the market's credibility rests on converting announced kiloliter targets into operating plants on schedule.