Each major street was separated by an area of roughly 532m, and those surrounded areas (known as Bo) were divided by mud walls and ditches, which were then divided into towns by three streets running down from north to south and east to west.
各大通りの間隔は約532m、大通りで囲まれた部分（坊）は、堀と築地（ついじ）によって区画され、さらにその中を、東西・南北に3つの道で区切って町とした。