Just a quick report tonight from Nielson//NetRatings Japan on internet usage from home computers (not mobile phones) for the month of May 2006. First the graph for time spent on the top six sites.
This 16.3% for Yahoo! Japan represents about 125,000,000 hours, or an average of around 168,000 simultaneous users. However, when looking at time spent per user who visited each site, for mixi it was 4 hours and 28 minutes per person, over an hour longer per person than for Yahoo! Japan. In total, 42,400,000 people accessed the internet from home during May, with an average time spent online per person of 18 hours and two minutes.