AI-driven demand has pushed copper prices so that the metal value of Japan's
10-yen coin now exceeds its face value. JX Advanced Metals, Mitsui Kinzoku and
Mitsubishi Materials say the coin is about 95% copper, 4% zinc and 1% tin; using
Japan exchange benchmark prices the metal content is worth roughly 10.4 yen.
Japan depends on imported copper concentrate, leaving its domestic industry
exposed to global price swings; JX Metals' domestic benchmark copper price was
up 56% YoY as of May. Local media report a spike in water-meter thefts targeting
copper-alloy components, with hundreds taken across multiple cities.