Japan Airlines and the rice bran biodiesel that could change how we think about sustainable aviation fuel

Japan Airlines has launched a demonstration project at Yamagata Airport using biodiesel derived from rice bran oil byproducts to power ground support equipment. While this isn’t sustainable aviation fuel (SAF) for aircraft engines, the initiative represents a significant step in diversifying aviation’s approach to decarbonization — targeting the diesel-heavy ground fleet that operates at every airport worldwide.

What Is JAL Actually Doing at Yamagata Airport?

Yamagata Prefecture, in northern Honshu, is prime rice-growing territory. Rice milling produces bran, bran yields oil, and that oil extraction generates byproducts that were previously treated as waste. A Japanese company developed a process to convert those byproducts into biodiesel, and JAL is the first airline in the world to use rice bran-derived biodiesel in airport operations.

The fuel powers ground support equipment — pushback tugs, baggage loaders, crew shuttles, and other diesel vehicles that keep ramp operations running. This is not jet fuel blended into a turbofan engine. But that distinction doesn’t diminish the significance.

Why Airport Ground Fuel Matters for Aviation Emissions

The aviation industry burns enormous quantities of fuel before an airplane ever leaves the ground. Every airport operates a fleet of diesel-powered equipment running continuously: tugs, belt loaders, deicing trucks, and fuel trucks. Decarbonizing that ground fleet using locally sourced waste products chips away at aviation’s carbon footprint without requiring changes to aircraft propulsion systems.

This matters because SAF — the drop-in replacement for Jet-A — remains expensive and scarce. SAF currently costs roughly two to four times conventional jet fuel depending on feedstock and production method. Airlines face mounting regulatory pressure, particularly from the European Union’s ReFuelEU mandate, which requires increasing SAF blend percentages starting in 2026 and ramping to 70% by 2050. Japan has its own parallel targets. The core problem everywhere is the same: global SAF supply cannot meet demand.

Three Reasons Rice Bran Biodiesel Is Strategically Smart

It uses an existing waste stream. No one is growing extra rice to produce this fuel. The bran is a milling byproduct, and the oil extraction from that bran generates its own secondary waste. This process pulls energy from material otherwise destined for landfill or compost.

The supply chain is regional. Yamagata grows the rice, processes it, produces the fuel, and burns it at the local airport. The entire chain is measured in kilometers, not transoceanic shipping routes. That matters for lifecycle carbon calculations. Some biofuels lose much of their carbon advantage once feedstock shipping and energy-intensive refining are factored in.

It diversifies the feedstock base. The SAF industry currently depends on a narrow set of pathways: used cooking oil (the most common), municipal solid waste, purpose-grown energy crops like camelina, and alcohol-to-jet conversion. Each faces supply constraints. Used cooking oil is already experiencing price inflation as demand from renewable diesel and SAF producers outstrips supply. Rice bran oil byproducts represent a feedstock with virtually no competition for demand — and rice is one of the most widely cultivated crops on Earth. If the process scales, similar programs could emerge across Southeast Asia, India, and parts of Africa.

What Are the Limitations?

This is a demonstration project, and the volumes are small. Running a few ground vehicles at a regional airport is far from powering ramp operations at Narita or Haneda.

Biodiesel has cold-weather performance issues — it can gel at low temperatures, a real concern at Yamagata, which experiences harsh winters. JAL and its fuel partner will be monitoring performance closely.

The larger open question is scalability. Could rice bran oil byproducts eventually be refined into actual SAF through the hydroprocessed esters and fatty acids (HEFA) pathway? Potentially, but that requires different refining infrastructure and certification under ASTM D7566, the specification governing SAF for turbine engines. That road is considerably longer.

Why This Matters for Pilots

The real significance extends beyond one airline and one airport. JAL’s project signals that airlines are beginning to think about emissions holistically — not just what exits the tailpipe at FL350, but the entire gate-to-gate operation.

For pilots tracking SAF policy, and every pilot should be, SAF mandates will affect fuel prices, fuel availability, and the cost of flying. In general aviation, the SAF conversation has centered on unleaded avgas replacements and whether piston engines will ever see a biofuel option. But the underlying principle applies universally: the more diverse the feedstock base, the more resilient the fuel supply, and the less exposure the industry has to price shocks driven by a single commodity.

For airline pilots, your carrier is almost certainly developing a SAF strategy. Understanding the difference between a demonstration project and a scaled solution provides sharper questions to ask when management discusses sustainability commitments.

JAL has been among the most forward-leaning carriers on this front, investing in multiple SAF pathways, signing offtake agreements with fuel producers, and now extending its focus to ground operations. Other carriers are watching closely.

Key Takeaways

• Japan Airlines is the first airline to use rice bran-derived biodiesel, running it in ground support equipment at Yamagata Airport as a demonstration project.
• The fuel is made from waste byproducts of rice bran oil extraction, creating value from material previously discarded.
• A fully regional supply chain — from rice field to airport fuel tank — strengthens the lifecycle carbon case and reduces dependency on global shipping.
• Rice bran represents a largely untapped, globally abundant feedstock that could expand the biofuel supply base if the process scales.
• SAF remains two to four times the cost of conventional jet fuel, making alternative decarbonization strategies for ground operations a practical near-term step.