About Microsoft Power Query add-in for Excel 2010/2013

I'm a Japanese user.
I couldn’t download the Japanese version of the Power Query add-in from the following site.

https://www.microsoft.com/ja-JP/download/details.aspx?id=39379

The published version and file name are not consistent, something is wrong.

On the other hand, the English version of the add-in is available for download.

So, I guess, there is a problem with the Japanese version.

How can I contact Microsoft to fix the Japanese version site?