Oyakodon, a soupy rice bowl with bite-size chicken and softly cooked egg, is often overshadowed by its more glamorous cousins — katsudon, crowned with a golden breaded pork cutlet, and kaisendon, jeweled with sashimi. But to describe oyakodon's layered textures and sweet-salty sauce of onions melting in soy, sake and mirin, the word magical comes up again and again. This recipe, more subtly seasoned than you might find in a Tokyo cafeteria, comes from the photographer Mika Horie, who grew up…
