IHIの佐藤さんが2024年10月に joint demonstratorの設計中と言っているんだけれども
“We’ve conducted research and development to allow us
to join the upcoming international collaboration with a good presence,” says Sato.
“The XF9 was one of the good results.
We are talking with Rolls-Royce in the UK and Avio in Italy,
and the collaboration is good so far.
We are conducting the design of the joint demonstrator.”

https://www.flightglobal.com/aerospace/ihi-aerospace-boss-eyes-revenue-growth-through-civil-military-programmes/160365.article