Here's the thing, you said "the genre of Japanese cyberpunk".
Is it in the same family? Yes. No one's arguing that.
As someone who is a scientist who studies cyberpunk, I am telling you, specifically, in science, no one calls cyberpunk made in Japan "Japanese cyberpunk". If you want to be "specific" like you said, then you shouldn't either. They're not the same thing.
If you're saying "Japanese cyberpunk family" you're referring to the taxonomic grouping of genres, which includes things from I.K.U. to Crazy Thunder Road to Burst City.
So your reasoning for calling a cyberpunk in Japan Japanese cyberpunk is because random people "call all futuristic looking films that?" Let's get Bladerunner and Videodrome in there, then, too.
Also, calling someone a human or an ape? It's not one or the other, that's not how taxonomy works. They're both. A Japanese cyberpunk film is a Japanese cyberpunk film and a member of the cyberpunk in Japan family. But that's not what you said. You said a Japanese cyberpunk film is a cyberpunk film made in Japan, which is not true unless you're okay with calling all members of the crow family crows, which means you'd call blue jays, ravens, and other birds crows, too. Which you said you don't.
It's okay to just admit you're wrong, you know?