Our favorite buffet inTaipei is across from the Ambassador Hotel on Chungshan Bei Lu, Sec 2. They have a wonderful selection of Chinese style sushi, sashimi, beautiful raw New Zealand oysters the size of a New York strip steak, raw clams, uni, unagi, cocktail glasses filled with inviting marinated seafood, tempura, all kinds of freshly prepared stir fried dishes and everything is finished with a large array of delicious deserts. It is on the second floor and I believe reservations may be a good idea. They also have a nice selection of beers and wines. Everything is included for a very reasonable price. I wish I were on a plane to Taipei right now. Enjoy.
There are probably a lot of good ones out there, and my info is rather dated.
But out of the 3 that I've tried in the last 3 years (Jogoya, Wasabi @ Taipei 101, Hsin Yeh, very near Mitsukoshi Taipei across from Taipei Main Station), I would say Jogoya 上閤屋日本料理 is the best....it is somewhere around the Xinyi area, I think it was reasonably close to Eslite Xinyi... but it is not so bad of a walk if it is not raining.
In terms of sashimi, from my visit in....2008?
needlefish / sayori
herring (nishin) looks like saba but with lots of eggs
some sort of local clam
some oily super white fish that may be similar to snake mackeral/escolar
I think the limit is 2 hours to eat all you can.
Address per website
re: K K
Been many times and yes it is pretty good. Not to hijack my own thread, but the food court in the new department store right above the Taipei City Hall MRT station is VERY good also. They have a great (by my 1st time trying opinion) Hainanese Chicken rice dish. There is another booth with an excellent 3 cup chicken. It is both tasty and plentiful for a decent price.
btw, back to the thread ... we went to Jogoya and it was very good. As KK said, the selection is huge, although they no longer have coke in a bottle. My wife said the shrimp she had was inconsistent in quality (some pieces were crispy and excellent and some were mushy). The grilled lamb I had had a lot of fatty connective tissue, but the meat itself was tasty. The sashimi is sliced to order, (about 5 or 6 varieties). They have some great grilled fish (sweet fish and salmon heads) dishes. All sorts of soups, dim sum, grilled meats. Wine and beer are offered (a plus). We went for late lunch, which went from 1:40pm to 5 pm. It was about 600 nt$ plus 10% service charge. I thought it was ok and should go on our keep list, but my wife thought that we have had better (on the 12th floor of the Ming Yao department store on ZhongXiao West Rd http://www.eatogether.com/). Although she did say she was still 'stuffed' about 2 hours after 'late lunch'. Bottom line, if you like to try different buffets give this one a whirl.
Thanks again KK.