ttps://nationalinterest.org/blog/buzz/study-picture-meet-japans-mitsubishi-x-2-shinshin-stealth-fighter-94911

> However, some military observers are less optimistic about the X-2’s RCS,
> and believe it to have more intermediate-level stealth capabilities comparable to
> the Chinese J-20?particularly due to the configuration of its vector-thrust engines.

形状は難しいから仕方ない