>>419
テンペストは最初から2035年配備という計画>>388で次期戦闘機と同じ
別の公文書にもテンペストとF-2後継機開発計画のタイムラインが一致していることから日本が関心を示し
2019年の英伊合意後の2022年に加わり(they were joined by Japan)GCAP発足の合意が調印されたと明記されている

As with Typhoon, it was envisaged that the UK would work with international partners to design and
deliver the new aircraft, now known in the UK as “Tempest”. Both Japan and Italy signalled an interest
in partnering with the UK, with the timelines dovetailing neatly with their own requirements for a next-
generation fighter to replace Typhoon for the Italians and the Mitsubishi F-2 for the Japanese.
In September 2019 Italy signed a statement of intent with the UK,2 and in December 2022 they were
joined by Japan, with an agreement signed by the leaders of all three countries bringing the Global
Combat Air Programme (GCAP) into existence.
(House of Commons Defence Committee The Global Combat Air Programme Third Report of Session 2024–25 HC 598)