The purpose of this report is to introduce and evaluate the basic character of the newly discovered historical material “Fushin Shitae-zu Tatami-ita”, which includes Tatami-ita（ tatami-mat unit board） and drawing instruments, with referring the consideration of the development of drawing instruments and technique of architectural planning and drawing. Tatami-ita is the 1:20 scale unit model of the real tatami-mat and used for the planning of middle or large size residence. Though paper-made materials have been known so far, this material is wooden and includes Shikibo that indicates the position of walls and doors, and can be recognized as valuable. The six drawing instruments are classified into three types, 4 Soejiku（ shafts）, a Zuhiki（ rulingpen）, and a Tsukibari（ needle）, respectively, leaving the old styel. The Soejiku is a drawing attachment tool used together with a writing brush and was used between some carpenters until the end of World War II. It is found that the Zuhiki is a tool equivalent to the present ruling pen. Although it is possible that the use age of this material dates as early as the 17th century, it is estimated to be around the early Meiji period even early in the early nineteenth century from the developmental situation of drawing tools.

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This report is studied about with the blacksmith and the historical change of the shape of widebladed ripsaws in KAWAI Collection, which was contributed to Takenaka Carpentry Tools Museum in 2015. The following points are shown. 1. We made inventory of 50 wide-bladed ripsaws in the collection based on the blacksmiths' name and the shape. 2. It was confirmed that producing areas of wide-bladed ripsaws with the name of 6 blacksmiths are Kyoto and Oumi-kouga, where are famous as places for noted product of a wide-bladed ripsaws. A historical change of the shape of every individual blacksmiths' name was shown. 3. Wide-bladed ripsaws in Osaka, Sendai and Aizu were also kept in addition to Kyoto and Oumi-kouga. We　showed those blacksmiths` brief summary of career and age while adding a literature search. 4. We showed the cultural value of the collection from the viewpoints of the historical change of individual blacksmiths' wide-bladed ripsaws and the variety of product areas such as Kyoto, Oumi-kouga, Osaka and Tohoku.

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This paper reports on the investigation of cutting edge traces left by cutting tools on the old wood materials in the main building of Chofuku-ji Temple in Nara Prefecture (built in the late Kamakura Period). The findings are summarised as follows: 1. Traces left during splitting lumber using wedges and chisels were found on flying rafters (Hientaruki). There were two types of traces on both sides of the member; one presumably left by wedges in approximately 7-sun (3.03 cm/sun) (21 cm) intervals and the other presumably left by chisels. The late Kamakura Period is said to be the period when lumber was manufactured by splitting according to an accepted theory. The traces found in this investigation provide the evidence to support this theory. 2. Traces left by cutting tools used in the process of rounding columns were found on the sides of the columns. The cross sections of the columns revealed some with 32 sides and some with round surfaces (finished surface). The surfaces of the 32-sided columns were found to be very smoothly shaved, suggesting the use of cutting tools other than the Japanese-style spear plane. The surfaces were more likely finished using a spear plane with a small curve, although this is inconclusive. 3. The traces of cutting tools on the above columns suggest that some type of tools that can plane wood more smoothly than the spear plane existed in the late Kamakura Period.

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