Former ballerina/nutrition expert/collector of fine things Mihoko Kiyokawa brings Franco-Japanese fare to the Flatiron. Tall ceilings, vivid artwork, gold-and-tan embroidered screens fill intimate dining room. Two- and three-course dinner menus highlighted by fluke tartare, buckwheat pasta with pork belly, king salmon with Japanese eggplant. Sushi bar as well. Name comes from Dr. Douglas...