Which company produced the world's largest gold bar (250 kg)?

Mitsubishi Materials produced the world’s largest manufactured pure-gold bar, weighing 250 kilograms. The Japanese company cast the record-size bar in 2005 at its Naoshima Smelter.

The bar is made from gold refined to 99.99% purity and is associated with the Toi Gold Museum in Izu, Shizuoka, Japan, where visitors can view and touch it. Its huge mass distinguishes it from the standardized bars commonly traded by central banks and bullion markets.

A useful comparison is the London Good Delivery gold bar, which typically weighs about 400 troy ounces, or roughly 12.4 kilograms. The 250-kilogram Mitsubishi bar is therefore about twenty times heavier than a conventional large-market bar and was created as a record and public exhibit rather than as a normal settlement bar.

The company’s full name is Mitsubishi Materials Corporation. “PAMP” and Perth Mint are also prominent refiners and bullion brands, but they did not produce this particular 250-kilogram record bar.