[microcolonel]

It wouldn't help. The real problem is that they aren't comfortable with English. The reason English has all the documentation, all of the methodology, all of the literature, all of the community: network effects.

A Japanese Stack Overflow would inevitably be less useful than access to the English Stack Overflow.

[b123400]

This, exactly. Stackoverflow does have Japanese version, and there are sites like Qiita for programmers to share knowledge. But the problem is most of the existing discussions are in English, and a Japanese version of the sites wouldn't help much except all contents are translated (not possible).