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イギリス
https://asia.nikkei.com/Business/Aerospace-Defense/U.K.-to-weigh-all-options-on-fighter-jet-cooperation-with-Japan

Wallace noted that the air force requirements of Britain, Japan and Italy are similarly aligned.(イギリス国防大臣)

イタリア
https://breakingdefense.com/2022/07/italy-expects-tempest-exports-by-2040-japan-working-on-jets-jaguar-system/amp/

“The Japanese requirement is similar to that of Italy and the UK. Early talks are very encouraging,” (レオナルドのFCAS担当者)