Taormina Sicilian Cuisine   Taormina is an Italian restaurant helmed by a Japanese Italophile, chef Aki Yamamoto, who most recently was at Spago Tokyo, and spent two months eating his way through Sicily. Taormina's menu is the result. Not much was lost in translation. It's a reasonable cultural exchange — Japanese and Italian cuisine both showcase the essence of top-notch ingredients, and tastes of both cultures are showcased in dishes such as the grilled tuna with herb oil — prepared with herbs, olive oil and capers, but also a touch of bonito. Though it can be pricey, Taormina's entrees are presented for sharing, and it is a strong addition to the city's Italian lineup.  227 Lewers St. 926-5050. 11 a.m.-10 p.m. Sundays-Thursdays, 11 a.m.-11 p.m. Fridays Saturdays. AX, DC, JCB, MC, VS. No checks; travelers checks accepted. $$-$$$.  Web site: www.taorminarestaurant.com.