2018 Volume 83 Issue 746 Pages 735-743
This study analyses the contents of the building construction documents used in building the Kojima House, which was built in the early Shōwa period in Sano City, Tochigi Prefecture.
The Kojima House consists of a Western-style house, a traditional Japanese-style house and storage structures, which are connected to one other and were built by the Ogawa-Gumi, construction company. The findings and knowledge obtained through the analysis of these documents are as follows.
·A total of 19 (20) sheets of architectural drawings, 23 cost estimate reports, 16 receipts and invoices, 21 receipts (and invoices) for the interior furnishings and attachments and 3 landscaping agreements were found. Furthermore, a report recorded by the owner on the total building cost, two records of the house's inauguration ceremony, a catalogue, business cards of the furniture suppliers and a photograph album, among other items, were discovered.
· The construction of the Western-style house was supposed to have started at the beginning of October 1925 and ended in 1926. The construction of the traditional Japanese house is believed to have commenced on 27 July 1926 (i.e. as the Western-style house was being completed) and basically completed around the end of August 1927. Subsequently, the general work, which included landscaping, construction of storage structures and so on, was finished in 1928. Then the final liquidation was done on 22 December 1928.
· Payment for construction of the Western-style house was divided into two instalments, whereas that for the traditional Japanese house was divided into six instalments. The payment for the small, attached structures was completed in seven instalments.
· The total cost report recorded by the owner states a cost of 94,757 yen and 27 sen for the house, which almost corresponds to the receipt amount. Similarly, the construction cost of the European style house is stated by Yamaguchi as 11,521 yen and 66 sen, which almost corresponds approximately (1 yen difference) to the receipt amount.
This study's analysis therefore demonstrates that the owner recorded the payment amount in the contents of the total cost report. It also shows that the building construction documents of the Kojima House include basically all of the reports and receipts related to its construction.