If you thought that Microsoft had secured all of Yahoo’s search queries, think again. Yahoo Japan, which is not wholly owned by Yahoo Inc. chose Google over Bing for their new search and advertising partnership. With the addition of Yahoo Japan’s search queries, Google will be responsible for serving advertisements as well as search results to over 80% of the Japanese market.

The deal will of course need regulatory approval, which may be hard to get. Because of the dominance this will give Google in the Japanese market, many analysts expect them to have a tough time getting this deal approved. Microsoft’s Bing looks to be the major loser in all this, especially if it turns out that Yahoo, which owns a minority stake in Yahoo Japan, makes more money with Google’s results than they do with Microsoft’s.

Google currently dominates worldwide search even though Microsoft and Yahoo had teamed up last year to take on the search behemoth. Google had originally entered an agreement last year to provide search ads and results to Yahoo Inc, however regulators in the US quickly forced Google to back out of the deal. It will be interesting to see if Japanese regulators will allow things to proceed, or if they too will force Google to make changes to the agreement they have entered into with Yahoo Japan. Google’s stock is up $5.04 to $494.01 at this time.