Do you suppose that there is really a Japanese minister today that has never used a computer? A smart phone? A microwave? A TV? An MP3 player? A network-connected device?
They probably use a computer to enter their home or office. Their desk phone is probably a computer. Their car radio is a computer.
It would be quite a challenge to find a living person in Japan today who has not used a computer. I suppose nothing is impossible, but some claims are so hyperbolic as to be ignored.
The project manager was in his fifties and had not only never used a website, he had never touched a keyboard or mouse.
That was secretarial (female) work.
The three things he did in his job was to dictate documents, have meetings and cause utter chaos.
The context here is a member of the national executive, so demanding detailed micro level experience is required is just silly, at that level nobody can have such broad detailed knowledge. The only practical way is that whoever is in charge learns what they need as they go along.
I think far more important is that whoever is in charge isn't an idiot so they can realize when they have to learn new things. The fact that this guy accepted a position for cyber-security without reading up on computers is plenty of evidence he is an idiot.