70% of Japanese social network users access most often from a mobile phone

"Which do you access SNS from more, mobile phone or computer? (Sample size=321)
Computer 14.0%
Mobile phone 70.4%
Both about the same 15.0%
Don’t know 0.6%"
Source: Point On Research, cited (& translated) by WhatJapanThinks, 10th June 2009
More stats available on the site.