1. Keihoku-Handenzu 京北班田図 preserved by Saidai-ji 西大寺 in Nara Prefecture of Japan is the map of Keihoku-Jori area 京北条里区. There are two copies. One is owned by Saidai-ji, and the other is owned by the University of Tokyo. That jori-area was developed to the northwest of Heijo-Kyo 平城京, the ancient capital during eighth century. Saidai-ji was established in 765 at the northewest zone of Heijo-kyo. It was one of the biggest temple at that time. But it had declined and been under the control of Kofuku-ji 興福寺 in the tenth century. Eizon (叡尊, 1201-1290) founded the Shingon-Ritsu sect at Saidai-ji. His sect increased in power and gained cotrol of the temple from Kofuku-ji in 1278. His sect had scrambled the dominium of northern area with Akisino-ji 秋篠寺, established in 780 and located about lkm to the north of Saidai-ji. Keihoku-Handenzu were the maps for the evidence of estate exchange made by Saidai-ji and Akisino-ji in the latter half of thirteenth century, and the mideaval mannor-map made from ancient official estate map called Denzu or Handenzu. We can reconstruct the example of the ancient Denzu or Handenzu from Keihoku-Handenzu.2. This paper reports the findings of observation on two maps. The observation is made on the followhings comparing each other.(1) Sizes of papers and composition of the ground paper.(2) Jori-grid lines on the map.(3) Drawing of the topography by colors and carbon liquid.(4) Letters on the map.(5) Process of drawing map.The auther proposed “the Methodology of Study on Historical Materials for Ancient Japan” on this journal in 1988.So this paper proposes the ways how to measure and to analyze ancient maps, taking Keihoku-Handenzu as an example.Observation is the fundamental work to reconstruct original materials from copies.This method is common to materials for ancient and mideaval East Asia.
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