Not "we could not find any." We looked, and the shelf is empty. Here is the evidence, so you can decide whether that is an opportunity or a warning.
The central bank policy rate is 2.75% (Bank of Korea Base Rate). source
KRW, empty. KRW1 (BDACS/Woori, Avalanche) is an explicit non-circulating proof of concept. No won-denominated yield instrument exists because no legal framework yet does; the Digital Asset & Cryptocurrency Act is still in play as of mid-2026 and the Bank of Korea wants bank-only issuance. Kbank/HashKey rail-building (July 2026) is pre-legislative.
An empty shelf in a currency with a real policy rate is a gap between what savers are owed and what they can reach. It closes when someone with the licence to hold the underlying paper is willing to put a claim on it on-chain. Until then, holders of KRW choosing to earn are choosing to hold a different currency, whether they have priced that decision or not. The calculator prices it.
See every currency or read how we establish that something is absent.