In addition, based on the analysis of street names described in ancient documents in Kanzeon-ji Temple, he supposed a jobo area (area with a series of avenues running at right angles to each other) that extends about 2.6 kilometers from west to east and about 2.4 kilometers from north to south, with 12 horizontal streets and 22 vertical streets.
加えて観世音寺に伝わる古文書類に記された条坊呼称の分析から、東西各十二条、南北二十二条の、東西約2.6キロメートル、南北約2.4キロメートルに亘る条坊域を想定した。