Abstract
The cultural history, the technical transition and the existing states of the Japanese castle's masonry walls (M. W.) were investigated for the purpose of their repairing, maintenance, administration and preservation, a. The modern times' M. W. transition is divided historically by the manufacturing conditions of building stone, the pile-up methods and the slopes. From the latter half of the 16-th century to the first half of the 17-th century, the rapid. construction technical advancement was achieved and most of the M. W. were constructed in this period. The castles from the ancient times' (7-the century) to the middle ages' (16-th century) are scarcely studied. b. By the example of the Kanazawa-castle's M. W. investigation., the ratio of the strangeness of the M. W. were the swelling appearance=21.8%, the extension of tree's root=26.8%, the omission of the stuff packed stone=24.6% etc. This result is similar to the other castle's. c. For the repairing of the M. W., it is important to know its construction period, and we proposed the M. W. construction period judging chart.
