In the capital area, the east part of Suzaku-oji Street is called Sakyo and the west part called Ukyo, and it was divided by ten Bo(s) (district), in a grid pattern called 'Jobosei,' in the north-south direction and east-west direction.
京域内には、朱雀大路を境にして東側が左京、西側が右京で、それぞれ南北・東西に十坊の条坊制地割りが設定されている。