Japan says it wants international collaboration in developing its Future Fighter for the 2030s, but it wants to lead the project despite limited experience in fighter development.
https://aviationweek.com/combat-aircraft/japan-could-pick-and-choose-components-tempest

aviationweekより
そんな国際共同開発したいのか、要素技術の共同研究レベルなのかわからんが