It took me a while to pronounce Cucina's name. (Ku-See-Na) Zen's more expensive sister serves some of the better sushi I have had in Bangkok, and the price is almost not outrageous if you make your selection well. (though a bit of a surprise for restaurant in Central World)

We went there yesterday and had a sushi set for one (nice), whale bacon salad (gross), and 3 orders of sushi. (Oh Toro, raw Matsusaka beef, and seared foie gras)