Siam Heritage serves excellent traditional Thai cuisine in a gorgeous dining room overlooking Tokyo Station. The spicy dishes here are complex and well-balanced rather than just fiery, with a wide-ranging menu that includes chef's specials and seasonal ingredients.

A recent meal started off with a bit of table theater, as our server presented a collection of seven freshly prepared spices and herbs in little glass bowls. After our inspection, these were blended together and served on an endive leaf as our complimentary amuse gueule - a pleasant way to prepare our taste buds for the dishes to come.

Shrimp Paste Dip with Vegetables (nam prik gapi) is something you don't often find in Tokyo Thai restaurants, but it's always a welcome sight. The dip here isn't quite as pungent as some that we've had, but it's still quite complex and bright with umami. The mix of dipping items includes tasty fried whitefish along with raw and cooked vegetables.

One particular highlight was the intensely flavored, very fiery Spicy Pork Salad. This was one of the best versions of this dish we've ever had, made with tender premium-quality pork that was thinly sliced rather than minced.

Also recommended are the Prawns with Eggplant - plump, flavorful prawns paired with fresh-tasting eggplant and a rich mix of spices. Chicken Satay comes in a thick sauce and provides a good contrast to the other, more fiery dishes.

The diverse drinks list includes nine wines by the glass from California, France, New Zealand and Germany, along with numerous wines by the bottle. There are also standard cocktails, festive fruit-themed cocktails, and mocktails. Chang beer is available.

Note that portion sizes here are very large, so we'd suggest dining with a group of three or four in order to try more than just a couple of dishes. Budget around Y6,000-8,000 for ample food and drink. The popular buffet lunch includes eight main dishes along with soups and desserts, and is priced at Y2,580.