The UK and Japan have announced plans to jointly develop a future fighter aircraft engine demonstrator – with the intention to explore further combat air technologies together in future.
UK Defence Procurement Minister Jeremy Quin is looking forward to the continued partnership with a "formidable power" and "close ally".
He said: "Our partners in Japan have made enormous progress on technologies that can complement our own advanced skills and could help ensure both our Armed Forces remain at the forefront of military innovation."
Work on the joint engine demonstrator will kickstart early next year, with the UK investing an initial £30m in planning, digital designs and innovative manufacturing developments.
A further £200m of UK funding is expected to go towards developing a full-scale demonstrator power system, supporting hundreds of jobs, including many at Rolls-Royce's Filton facility in Bristol.
Over the next four years, the UK is already investing more than £2bn into its major national and international effort to design a world-leading Future Combat Air System.
The Future Combat Air System is expected to combine a core aircraft, often referred to as ‘Tempest’, at the heart of a network of wider capabilities such as uncrewed aircraft, sensors, weapons and advanced data systems.
The UK and Japan has also agreed on a 'Memorandum of Co-operation' which allows both nations to pursue joint technologies.