Blog posts in Japanese have topped the blogosphere , according to Technocrati’s State of the Blogosphere report of April 2007.
Currently, 37% of blog posts are in Japanese, up 4% from the last report. English posts came second with 36%.
Based on my observations, Japanese blogs are often personal diaries, moblogs -content posted from a mobile or portable device- and photoblogs. Even though thematic blogs  have became more and more common as of late, the Japanese blogosphere is still lagging behind its english counterpart when it comes to insightful blogs delving into specific themes.