"Ryunosuke Jesse Matsuoka, co-owner of the Japanese restaurant Sen in Sag Harbor and Southampton’s Manna at the Lobster Inn, says negotiating with purveyors has allowed him to control pricing, and he adjusts menu prices accordingly. When the price of lobster went down, for instance, he lowered the price. 'But some restaurants kept it high,' he says, 'and customers didn’t know any better.'" - ByBeth Landman