Ore TMRs, which are the total amount of overburden and rock to obtain metal ore, were estimated as a fundamental data to estimate the value of TMR(Total Materials Requirement) of metals. Ore TMR of coal, iron, copper, zinc and tin are estimated 12.5, 5.1, 304, 34 and 95 representatively by statistic method based on hearing and investigation of practical mining sites. An approximation from the quality of crude ore and further approximation from the concentration of the metal in the crust were also proposed as (ore TMR)＝2.0/{100×(quality of crude ore )} and (ore TMR)＝2.0×(concentration in the crust [ppm])  2/3)

A potential amount of urban mining in Japan is estimated. The potential amount includes the amount of in use stock, used stock and dissipated stock in Japan. The accumulation is estimated by considering the balance between import and export beyond the boundary of Japan after the World War II. The amount of material which was exported as parts of products is estimated by Input/Output Table Analysis with an assumption that material flow is in proportion to cash flow. A considerable amount of metal was estimated to be accumulated in Japan. The accumulation amount of gold and silver is 6,800 tons and 60,000 tons respectively. They are greater than the reserves of richest resource possessing country, South Africa for gold and Poland for silver. The accumulated amount of Al,

The treatment and recycling flow of copper-containing waste such as power lines, telecommunication cables, railways cables, electric appliances, machines, automobiles, industrial machines and buildings were studied. The main results are as follows in thousand of tons in 1994 in Japan.A total of 560 thousand tons of old scrap copper were estimated to be generated, in which 197 were from power lines, telecommunication cables and railways cables, 128 from electric appliances and machines, 48 from automobiles, 61 from industrial machines, 126 from buildings. A total of 382 thousand tons were recycled either in Japan (337) or abroad (45) and the residual 178 was estimated to be landfilled.

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