White Smoke was the restaurant where I had dinner tonight. The food was great and I was totally stuffed by their all-you-can-eat. I should not forget to mention their pecan pies were awesome.
The charge was a bit pricy (JPY9,000 including all-you-can-drink), but I am sure it is worth going once at least. I heard they do all-you-can-eat once a month. Check it out!