ようこそいらっしゃいました。(Welcome in Japanese)!
The Google Maps Directions to GPX now has support for all available languages in Google Maps. What this means is that you can get directions and next turn information in other languages than English.
Update #3 is now live but I am still working on providing accurate "next-turn" information for non-English languages. This will be available shortly.
Try it now
Are you interested in the development of this tool? Here are the previous posts: Original post, Update #1, Update #2, Update #3, Update #4.
The Google Blogger.com template system is flexible and somewhat programmable. However getting to learn its idiosyncrasies and mastering the template language it are close to impossible.
I've applied several major updates to the tool discussed in this article.