5.
12.3%
Japanese is the most widely
used non-English WP locale
Followed by German, Spanish, French,
and Russian
English (US) is 54% of all locales
Source: wordpress.org/about/stats/
6.
78.5%
WordPress share for
Japanese sites with CMS
7.6% = Adobe Dreamweaver
2.6% = Livedoor blog
11.3% = Others
Source: w3techs.com/technologies/segmentation/cl-ja-/content_management