<p> So far, Inagaki Ezo who was donated the sketch book left by J. Conder has knitted an essay, and Suzuki Hiroyuki discussed the contents in "Josiah Conder no kentiku-kan to Nihon". The author has already considered the individual sketches, such as for the Nobi earthquake that occurred in October 1891, the stone survey of the parliament building conducted by Conder from 1887 to 88, and the sketch of the castle. Suzuki points out that: In the illustration used in Notes on Japanese Architecture, the first paper for the Conder read at the Royal Architect's Association on March 4, 1878, a copy of the original picture published in the sketch book was found. Here, Suzuki introduced Conder's first paper, and Suzuki thought that Conder had been eagerly walking around Japanese architecture since the spring of 1877, sketched it, and compiled this paper. In addition, Suzuki has compiled a comparison table between the illustrations of the Conder First Paper and the original drawings, and Suzuki showed that in the first paper, Conder used seven sketches from the sketchbook. In other words, Suzuki does not have a yearbook for the illustrations published in Conder's first paper, but these were drawn between Conder's arrival in January 1877 and March 1878 when the paper was published. Indicated. By the way, Suzuki did not show the time, purpose and the motivation of the original painting used in Conder's first paper. On the other hand, Conder himself wrote as follows at the beginning of the first paper.</p><p> In venturing to connect some sketches made by me in Japan with a short Paper upon Japanese Architecture, I feel no small measure how imperfect is the knowledge that I have as yet been able to accumulate on the subject.</p><p> Conder associated the sketch with the paper, but did not draw the sketch for the sake of the paper. Therefore, the purpose of this paper is to clarify the background of these sketches and when and what buildings were drawn. This article focuses on the sketches in the sketch books by J. Conder, focusing on the original article cited in Conder's first paper. The following points are clear.</p><p> In Conder's first paper, Notes on Japanese Architecture, eight illustrations were used, and seven can be confirmed as original drawings in Conder's sketch book. In addition, the description of May 1877 can be confirmed on one of them. Of the seven original drawings, the 6 buildings Kameido Tenjins Gate and Main Hall (part), Ueno Toshogu Karamon Gate, Asakusa Honganji Temple Hall, Hie Shrine Copper Sculpture, Zojoji Kyozo, and Bunsyo-in Reibyo Syoro. Conder imposes photocopying to the first-year students of Kobu University, which was held every Saturday at Nijubashi, Ueno Park, Shiba Park, Kameido, Hie Shrine, and others. Conder made the sketch for Kobu Daigakko's first graders, this was done every Saturday at Nijuba-shi, Ueno Park, Shiba Park, Kameido and Hie Shrine. He thought that building sketches were necessary to cultivate modeling skills. It can be considered that the original sketch used in his first paper was carried out at this time. In the Conder sketchbook, the sketch depicting the double bridge before the replacement is left.</p>