The City Korai Quartz Depository is the Mainland’s primary financial institution, where quartz is formalised, verified, and moved at scale. Once the physical heart of Uji’s wealth, it now functions as a ceremonial and administrative centre following the Quartz Depository Law (188–190 AL) under Chief Wen, which rendered all physical quartz  obsolete and shifted the entire system  digital.

Inside, tall columned halls echo with quiet transactions — agreements signed, trusts established, and fortunes restructured. While everyday activity has largely migrated to the network of Quartz Depository kiosks across the Mainland, the central Depository remains essential for high-value transfers, complex account management, and legally recognised financial dealings.

It serves as a neutral signatory ground for Korainian-to-Korainian lending, where private agreements are formalised. The Government itself does not lend, but its presence here ensures every transaction is recorded, enforceable, and quietly surveilled.

Most Korainians will visit The City Korai Quartz Depository only a handful of times in their lives: to establish a birth-day trust, sign a significant loan, or formalise a major financial shift. To step under the purple dome roof is to engage directly with the system that underpins Uji’s economy.