The sale by Yahoo! of Overture Japan to Yahoo Japan - a separate entity owned largely by Soft Bank (41%) and Yahoo (34%) - has been questioned by Eric Jackson at Seeking Alpha. The price of $13 million seems low and the decision to sell the PPC engine of the largest search engine in Japan seems interesting.
Yahoo Japan is the most popular engine in Japan with a 65% market share, according to Forbes magazine.
I have a hard time figuring out how things are priced.... remember the $1.65 billion for YouTube and it is not making the same kind of money PPC in Japan must be.