This paper deals with urban formation of the Gosanken-chou at the crossing Kamitachiuri-dori street and Kokawa-dori avenue. This block was depicted as a big mansion of 'Hosokawatono' on the 'Rakuchu-rakugai-zu' in the middle of the 16th century. Later it was drawn as the dwelling area called Gosanken-cho on the 'Rakuchu-ezu' in the first part of the 17th century. The dwelling area was formed just after the fire attack of the Kamigyo district by Nobunaga Oda in 1573. The morphological transformation was shown on the plans reconstructed by the survey of houses and land in the daichuh'in archives of 1587. The dwelling area after the fire attack started to be built and had houses in a row which faced the street or crossed the stream. Then the backyards behind the'houses were gradually divided among them into the narrow stripes.
