Sure they can go read an IEEE article, but 9/10 times they'll go to a Japanese source b/c it's so much easier for them.
For programming it's probably only worse. I imagine there is a Japanese equivalent to Stack Exchange, but it will have a tiny fraction of the help you get on the English language one. It's probably like programming in the 90s! =)
It's as if mammals evolved on an island without any dinosaurs, and then swam over to the mainland.
Either way, isn't Japan also famous for its engineering prowess? I doubt that country with such high engineering competency will lack talent for web development simply because of the language barrier (if there is actually the lack of talent at all). I'm not saying language barrier doesn't exist but if language barrier didn't prevent them from having companies like Konami, Square Enix, Namco, Bandai, Nintendo or Sony then why would it prevents them to have more web developers?
Ruby was created by a Japanese for that matter.
Because UX/design = programming..?
>Is the claim that the Japanese are technologically behind the rest of the world? Why would web development/design be different than almost every other technical industry?
Many programming languages are based on English and the Latin script. Programming, and more specifically web programming, requires a level of fluency with English and its alphabet that I would expect significantly decreases the available talent pool in non-Anglo countries, especially countries with different writing systems[1].
No other technologies lean so heavily a specific language. Math and science are universal and independent of any language. Computer science is universal. Computer programming is not.
[1]Comparing a country like Vietnam (that uses a Latin script) to another equivalent Asian country might be interesting.