Sumiyoshicho 6-68-1. Open 8:30am-10pm (LO). Closed Sundays.
Excellent casual Italian snacks to go with your drinks, with flaky thin-crust pizzas and original items like renkon frittata (lotus root fritters) - nicely spiced and not a bit greasy. The Mediterranean-style interior is a pleasant oasis amid the office buildings; there's also a cafe and a take-away bakery downstairs.