This news it a tad old, and who knows really how they estimated these numbers, but it’s kind of interesting for reference. I’m a bit skeptical that Blogger, Diaryland and LiveJournal have 50% of their registered blogs updated, but that may be true. Japan isn’t even in the top 10. Farsi and Icelandic beat out Japanese.
Blogging is only done by 2% of those online. It’s important to remeber that.
Blogging By The Numbers