Abstract
"Edo-Castle" was the residence for "Tokugawa-Shogun" and "Kyoto Imperial Palace" was the residence for emperor. Whenever both of them were reduced to ashes, they were reconstructed by "Tokugawa-Shogunate" in Edoera. In the old documents about the reconstruction of those two, "Honto" was used as a date for estimation.(Edo-Castle; in 1838, 1844 and 1864. Kyoto Imperial Palace; in 1663, 1665, 1675, 1789 and 1847.) According to these old documents, "Honto" is used as following; (For instance, standards for carpenter) 1) A) Standard wage per a day, per person. B) The number of carpenters per unit area (6.5 shaku square) This depends on rank of house. C) The ratio for standard wage. This depends on social and economical conditions, a labor conditions, a rank or position of his occupation, and the standing of his family, etc. 2) The process of estimation; "Honto-A" multiplied "Honto-B" is carpenter's standard cost. The total cost of carpenter is, therefore, A×B+A×B×C=A×B×(1+C)
