Kawasaki tests hydrogen aircraft engine with low‑NOx combustor in Akita
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Kawasaki Heavy Industries successfully tested a small aircraft engine running on 100% hydrogen, confirming stable operation and low NOx performance at JAXA’s Noshiro Rocket Test Facility in Akita Prefecture.
The combustor uses Kawasaki’s Micro‑Mix combustion technology originally developed for power‑turbine generators, and Kawasaki says this is the first domestic test of a hydrogen‑fuel aircraft engine with a low‑NOx combustor. The company claims the engine can meet ICAO’s tightening emissions regulations and achieve world‑best low‑NOx performance, and the test was part of NEDO’s Green Innovation Fund project “Hydrogen aircraft core technology development” covering 2021‑2030. Kawasaki is also developing liquid‑hydrogen fuel tanks and reported a successful liquid‑hydrogen filling test of a prototype tank in November 2025.