The author carried out an investigation on the subject of the saw and sickle which are now kept in the Gallery of Horyuji Treasures. The following results were obtained. 1) The length of the saw blade is 430mm，and the working stroke is about 266mm long. 2) The teeth on the saw are of the cross-cutting type. There are 17 teeth on the blade. 3) The tip of the saw has been mended which indicates the blade was actually used in constructing the temple. 4) The length of the sickle blade is 400mm， and the maximum width is about 80mm. 5) This type of sickle seems to be suitable rather for ceremony than for actual service.

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One point of japanese carpenter concern on his task was to produce the best surface smoothness of wood in planing, so in traditional wood building only planing surface was used for the structure member and interior fittings without polishing or painting. The purpose of this study was to provide the information on surfacing of wood with finishing plane. Test specimen， sap wood of japanese cryptomeria (sugi)， was planed by 8 planes and was measured surface roughness on the part of spring wood by means of knife edge sensor. Test result may be summarized as follows: 1. Measured roughness (Rmax : maximum roughness defined by DIN) expressed the wood surface condition comparing with surface photograph and eye observation. 2. Minute wooly grain roughness observed naked eye was approximately Rmax>9μm. 3. It was considered that cutting angle affected the surface roughness and showed most few roughness in cutting angle 39°. 4. It was difficult to find a certain relation between roughness of blade edge (Rmax ＝4～10μm) and wood surface roughness. 5. In successive cutting test， accumulate length of 15M wood planing did not change the average roughness of wood surface in blades finely sharpened. But accumulate length of 30M wood planing showed the surface roughness increase in some blades.

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