If you built a building to use the land, and poor road conditions connected, amortization, costs and expenses to improve soil structure and build earthquake-resistant to a good ground. If you are in some cases by soaring construction costs in unexpected places. Cost factors, are set fire to the building, therefore, in areas designated as disaster management area or gross floor area more than three-storey building and 100 square meters or more buildings, urban planning, for example , is a factor affecting the profitability of the land ie. I think the general profitability of the land want to keep building costs, the cost of delivery of equipment only. Even quasi-regional disaster reduction. RC or profitability of a wooden or steel frames or is of a very different.