Kohaku is a kaiseki restaurant in an alley in Kagurazaka that serves Japanese courses. Its dishes mix traditional ingredients with Western ones, such as katsuodashi simmered with orange, fugu hoe with caviar and ankimo, and lily root chawanmushi with truffle. The quiet building in the inner alley has private rooms, a garden, and ample space between seats. Diners expecting purely traditional Japanese food find ingredients like caviar and truffle unfamiliar.