>>414
その記事に限らず、sixth generation fighterでググれば最初に出てくるウィキペディアで
F-Xが第6世代機計画の一つに入れられてるから海外では普通に第6世代機扱いされてるよ。
https://en.wikipedia.org/wiki/Sixth-generation_jet_fighter#Proposed_sixth-generation_stealth_jet_fighters

https://www.defenceconnect.com.au/strike-air-combat/6444-japan-confirms-timeline-for-next-gen-air-superiority-fighter-jet
https://militarywatchmagazine.com/article/japan-gets-serious-about-sixth-generation-fighter-program-prototype-to-be-built-by-2024
https://edition.cnn.com/2020/07/10/asia/japan-new-stealth-fighter-intl-hnk-scli/index.html
https://youtu.be/C5yS6wx-bag?t=792
https://youtu.be/iKeZdX1JLmw?t=668