Yahoo Japan and Google have signed a deal which will see search results provided to Yahoo Japan users. Yahoo Japan will use the Google search results but will not uses Google’s technology for supplying the accompanying search advertisements.
Yahoo is currently using Microsoft’s Bing to supply search results, although it looks like Microsoft were not able to convince Yahoo Japan to do the same.
Yahoo Japan is owned by a number of companies which includes Yahoo, although Softbank holds a larger share than Yahoo, so this may have had something to do with the decision to use Microsoft instead of Google.
via Cnet