The Sankyo soko is located in Sankyo Town, Sakata City, Yamagata Prefecture, and it has 12 warehouses facing the east side of Niida River in the south of the downtown area of Sakata City. They are called "1 gou" to "12 gou " in order from the north side. Currently, 10 buildings from 1 gou to 10 gou warehouse are owned by JA Zenno-Yamagata, 1 gou warehouse is used as an exhibition such as "Shonai Rice History Museum", 2 gou to 10 gou warehouse stores rice grains, 11 gou and 12 gou warehouse are used as the Sakata City Tourist Product Center “Sakata Yume no Kura”. The space between 5 gou and 6 gou warehouse is rather wide, and it is the approach to the Sankyo Inari Shrine located on the back. The space between 11 gou and 12 gou warehouse is rather large, and the east side front of 1 gou warehouse to 10 gou warehouse and 11 gou to 12 gou warehouse are connected by kuramae. Zelkova trees are planted in a U-shape around the north, west, and south (between 11 gou and 12 gou warehouse) to avoid seasonal winds and solar radiation. Hirayama et al. conducted a survey of warehouse buildings in the Sankyo soko in 2019. The purpose of this article is to show the history of warehouse buildings and the actual conditions of nails used, based on the results of architectural research. The following points are clarified.

 Sankyo soko held the inauguration ceremony on November 3, 1893. Now, 1 gou to 12 gou warehouse are lined up. Of these, from 2 gou warehouses to 7 gou warehouses were originally built in 1893, from 8 gou warehouses to 10 gou warehouse were built in 1894, 1 gou warehouses and 11 gou warehouses were built in 1895, 12 gou warehouse was built in 1916. The damage to the warehouse caused by the Shonai earthquake in 1894 was considered minor, but from 8 gou to 10 gou warehouse and 2 gou warehouse were also damaged. In addition, the big braces seen from 2 gou to 10 gou warehouses were installed for reinforcement after the earthquake. Initially, the Western nails were used in the all warehouses, but Japanese nails and Western nails were used together for the big braces after the 1894 earthquake. It can be judged that the combination of Japanese nails and Western nails is late in the era.

近年、地方都市の中心市街地において観光客を誘致する都市が増加しているが、それぞれの観光資源の状況に応じた事業が展開されていないと考えられる。そこで本研究では、「地方中心・中小都市」の98都市144計画を対象として、観光を活用した地方都市の中心市街地活性化に関する示唆を得ることを目的とする。地方都市の中心市街地において、観光資源の状況に応じて面的に事業を展開することで観光客の増加に成功している都市が複数存在している。しかし、新規の単体施設整備や多くの都市で取り組まれているイベントなどのソフト事業によって観光入込客数の安定的な増加を図ることは難しい。ここから、都市の持つ歴史や文化を活かしながら、資源をネットワーク化し面的に事業を展開していくことが重要になってくるのではないかと考えられる。