- vol.8, no.1, 1987-02-20
An armour of Oyoroi type, the simbol of the armours available in the Japanese middle age, was characterized with a big rectangular sleeve for defense together with a helmet and with a lace of brilliant colours having shown a majestic appearance. The so-called Osode, the above sleeve of "Oyoroi", was later attached to a light armour of Domaru type or Haramaki type, too and used for practice over through the middle age. The "Osode" sleeve is assumed to have been formerly made in an arbirtary dimension. In the latter Kamakura era it began to be made 35 cm wide, expanding wider than the conventional. Since the Nanboku-cho era the dimension of the width of Osode seemed to be standardized and it continued for about two hundred and several ten years up to the end of the Muromachi era. I watched the fact the dimenssion of a 35 cm wide Osode corresponded to just one shaku of the "Taka-Bakari" which equalled one shaku one sun five bu of a regular scale, while Hirotaka Yashiro and Ekisai Kariya pointed that the "Taka-Bakari" was used for an armour making. So I compared real measurement values shown in "Kattyu Irei", an old literature, with the "Taka-Bakari" and referred to the related literatures for an evidence supporting my judgement. After my research I assume that "Taka-Bakari" began to be used by craftsmen of armours at the latter Kamakura era and Osode was standardized with a "Taka-Bakari" as standard scale since the Nanpoku-cho era, and the width was made one shaku of the "Taka-Bakari". I assume the Following, too : in the background that the "Taka-Bakari" prevailed among the craftsman of armours and was standardized, 1) there was an increasing demand for armours which reflected breaking conflicts in succession and 2) coping with it, a craft unicom was organized and process rationalization per standardization or division of labor followed.