Board Thread:General Discussion/@comment-749631-20150615161048/@comment-1820055-20150616024527

187.192.25.123 wrote: Im not an expert, but is it not enought with set the browser Accept-Language: ja as default? yes its possible, but that includes changing your whole browser language into japanese, unless there's another way I do not know of. But the sure way to do this is to use an extension which modifies the headers.

Accept-Language should determinate the user country based on that insteand of the use of the IP. Supposedly yes, if they think Japanese people defaults their browser to Japanese, they could make it a country validation mechanism.