B2F Hibiya CHANTER BLDG 1-2-2, Yurakucho, Chiyoda-ku.
Tel. 3581-7421

Open from 11:00 to 14:30 and from 17:30 to 22:00 (LO at 21:30) as a restaurant, from 15:30 to 17:00 as a bar. L'affresco is very expensive. Dinner courses from 4800 yen to 6500 yen and lunch courses between 2300 and 3800 yen.

It's next to Bistrot New Orleans. See this last's review for a map to get there.