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I think you might have lost a slight advantage now that your domain name does not contain your primary keyword phrase. I'm not saying having your primary keyword phrase in the domain name is the b-all, end-all, but it helps. Try putting more content on the page. It's pretty thin now, especially compared to the current top ranking sites. You're short on links too, and going up against some pretty big hitters. Try getting some direct links to your Japanese Spicy Mayo page. See if those two things help. Meantime, I agree with Jim McKaye. Stick with it. The dust hasn't completely settled.