Japan's urban mine is among the largest in the world. Yet its gold recovery rate is under 10%. What's missing is not smelting technology but a system for collecting.
Japan has long been called a country without resources. But viewed through the lens of the "urban mine," the story flips. Roughly 6,800 t of gold lies dormant within the country — 16% of the world's current reserves. Silver: 60,000 t, or 22%. Not underground. Buried thin and wide, inside products.
Its smelting technology, too, is at the world's leading edge. The problem is not the technology to strike that ore body. It is an entirely different problem: not "mining," but "collecting."
What sets the urban mine apart is its grade. Mine a tonne of natural gold ore and you recover about 5 g of gold. Mine a tonne of used mobile phones — roughly 10,000 handsets — and you recover about 280 g. More than fifty times as much.
Rare metals follow the same pattern. Indium, tantalum, tin. Japan's urban mine holds several metals in quantities exceeding a tenth of the world's reserves. Measured by underground resources, a "resource-poor nation"; measured by above-ground resources, a "resource-rich nation." That is the true picture of this country.
The ore body is already there. The problem lies beyond it.
Despite an ore body this large, less than a tenth of the gold is actually recycled. Japan discards roughly 650,000 t of small electronics a year, containing tens of billions of yen worth of precious metals. Yet most of it is hoarded in the backs of drawers, or flows out of the country.
The reason is not a shortage of smelter capacity. It is that the ore body never reaches the smelter. Underground mines and urban mines may both be "mines," but what rate-limits them is completely different.
In the smelting world, capacity keeps being built out. Waste circuit boards from electronics — E-Scrap — arise at roughly 800,000 t a year worldwide. The heart of the urban mine. Plans to expand intake capacity by 1.5x are already underway.
But widen the capacity, and if the collected volume doesn't follow, utilization simply drops. Smelting capacity can be increased with capital and technology — a problem solvable in a few years. Collected volume is not like that. Dispersed points of discharge, hoarding, outflow abroad, transport cost. None of it is solved by metallurgy.
Processing capacity grows with capital. Collected volume grows only by solving the structure.
pool is the data infrastructure for resource circulation. It binds discharge, collection, and procurement into a single data foundation. It makes the "collecting" leg — from the point of discharge to the smelter — visible, optimized, and traceable.
The processing already exists. This country has world-class smelting technology. What's missing is the upstream layer that delivers volume to its mouth. Where, what, and how much lies dormant, and how to move it so it arrives most cheaply and reliably. The work of recording and designing that.
This is not a concept. It is already running across 1,200 sites in the City of Yokohama.
The urban mine is already there. The smelting technology is there too. All that's missing is the design of the "collection" that connects the ore body to the smelter.
This is not about the technology to mine. It is about the system for collecting — which is to say, it is about data.