Wrap the rice in a 4-in (10-cm) square piece muslin or cheesecloth and secure with a string.
Place the rice bag, chicken, konbu, saké, salt, sugar and water in a large saucepan and bring to a boil. Just before it boils, remove and discard the konbu. Reduce the heat to low and simmer for about 20 minutes, occasionally skimming the surface to remove