This is the kind of boneheaded maneouver that really shows how backward and uninformed some Japanese companies are.
If Maininchi thinks that they can get more traffic on their own than if they were indexed by more than one search engine, they are deluding themselves.
editorsweblog.org: Google launches Japanese news-search service... without Yomiuri

Is Mainichi the same company as Yomiuri?
If not, you may want to fix your post title...
And the post itself. ;-)
little old, but... "Why is Big Media losing viewers? Because it sucks." (Aaron Swartz: The Website)
I quoted you and editorsweblog on my Japanese blog (see my trackback).
A Japanese writer, Kei Ogikubo, pointed out that Yomiuri is offering their news to Yahoo! news. I haven't checked but maybe it is an exclusive deal. Just wanted to let you know.