Abstract
To reveal the validity of Wikipedia as a gateway of information seeking activities, we examined more than 1,190,000 external links embedded in Japanese Wikipedia to see if there were any dead links or access problems. As a result of analysis, the following facts have been found; 1) About 11% of external links in Japanese Wikipedia were invalid; 2) The external links with the domains such as edu, co.jp and go.jp had quite a few access problems. 3) Newspapers websites had notably high percentage of the dead links.
