Tips for JPY/KRW
- • Compare rates from multiple sources before exchanging JPY to KRW
- • Business travelers should use TTM rates for expense reports
- • Check Zenrate regularly for the latest mid-market rates
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Frequently Asked Questions
How much is 10,000 JPY in KRW?
Use Zenrate to convert 10,000 Japanese Yen to South Korean Won at the current mid-market rate. The rate updates throughout the day.
What is the best JPY to KRW exchange rate?
The best rate depends on your method. Check Zenrate's Exchange Finder for crowdsourced rates from money changers, or compare online services on our Compare page.
Where can I exchange JPY to KRW?
Use Zenrate Exchange Finder to find money changers with the best rates in cities across Asia. For online transfers, compare services like Wise and Revolut.
What is TTM rate for JPY?
TTM (Telegraphic Transfer Middle rate) is the mid-market rate used by Japanese banks for accounting. Zenrate Business mode shows TTM, TTS (sell), and TTB (buy) rates for expense reports.
Is it better to exchange at the airport or city?
City exchange shops typically offer 3-5% better rates than airports. Use Zenrate Exchange Finder to compare before you travel.
Sources & Methodology
Exchange rates are mid-market rates sourced from the Exchange Rate API, which aggregates data from central banks and financial institutions. Historical data is provided by the Frankfurter API (ECB reference rates). Rates are cached for 12 hours and are for informational purposes only. Actual transaction rates from banks and services may differ.
Reference notes for JPY/KRW
When you typically see JPY/KRW
Japanese tourism to Seoul, Busan, and Jeju is the largest single source of JPY-to-KRW lookups in Zenrate. Short trips generate small numbers of receipts at restaurant, taxi, hotel, and shopping prices; the per-receipt amount is small but the per-trip count is high. K-content has produced a second, growing flow: K-beauty (cosmetics ordered from Korean direct-to-consumer sites that bill in KRW), K-pop merch from Korean platforms, and Korean web-comic platform subscriptions. A smaller but real B2B flow comes from Japanese SMEs hiring Korean contractors or buying Korean industrial inputs — Samsung-affiliated component suppliers, Korean chemical and steel imports.
How JPY/KRW behaves in accounting
Mizuho publishes JPY/KRW TTM, TTS, and TTB directly. The KRW values are quoted per 100 KRW, not per 1 KRW — a Mizuho TTM line for KRW will show a number around ¥0.10–0.12 per 100 KRW (i.e., 1 KRW ≈ ¥0.10). KRW is moderately volatile against JPY, with sharp moves possible around BOK rate decisions or Korean political events. For tourism receipts (highest volume use case), transaction-date TTM is conventional. If the trip spans more than a few days, batching all receipts at a single mid-trip rate is a common shortcut for personal accounting but is technically incorrect for corporate expense reports — each receipt should resolve to the rate on its actual date.
Common conversion mistakes for JPY/KRW
The KRW quoting convention is the single most common source of errors in this pair. Mizuho quotes per 100 KRW. The exchangerate-api.com source used for live conversion quotes per 1 KRW. A user comparing the two side by side will see a 100× difference and think one source is broken. Zenrate normalizes to per-1-KRW internally; if you copy a Mizuho TTM line directly into a spreadsheet without adjusting, all your yen totals will be off by 100×. Second: Korean credit card receipts that include a 10% VAT line. The VAT is part of the KRW amount paid; do not subtract it before applying the JPY rate. Third: applying the airport KRW rate from a Narita FX counter to the entire trip's receipts. That counter rate captures the bank's transactional spread for the airport transaction only — every other receipt in Korea was paid in cardin which case the card's settlement rate applies, or in cash exchanged at a different rate.
What Zenrate stores for JPY/KRW
Live conversion via exchangerate-api.com, twelve-hour cache. KRW is normalized to per-1-KRW for consistency with all other pairs in the converter. Historical Mizuho rates via dbFetcher/edgeFunction. Note that the stored Mizuho values are per 100 KRW, matching Mizuho's publication; the rate-source code is responsible for normalizing on read. ECB KRW via Frankfurter. All six policies work. Prior-month-average is reliable since BOK trading days line up closely with Tokyo trading days (both miss Saturday/Sunday and most Japanese holidays).
These notes describe the rate sources actually implemented in @zenrate/core/rate-sources at the time of publication. Behavior may evolve; the source code is the ground truth.