As you know, Yahoo Japan is expected to switch over their search engine to be powered by Google and not use Microsoft Bing.
Some are reporting that this has happened as of yesterday or this morning.
Garya at WebmasterWorld said, "Yahoo Japan is now showing Google results." I personally checked it out myself and didn't see any powered by Google nor did I see the results on Yahoo Japan to match that on Google Japan. So maybe the rollout has begun and not everyone is able to see it yet.
Further more I see a disclaimer that reads the results are powered by Yahoo. Again, maybe I don't see it yet.
Do you see it? Check out Yahoo Japan Search and let me know.
Forum discussion at WebmasterWorld.