As of September 24, 2026, the daily reference rate puts 100 JPY at ₩862 — about 3% less than the roughly ₩888–889 it bought seven days earlier.
For you, that means every ₩10,000 meal or subway ride in Seoul costs about ¥120 more than it did last week, and a ₩100,000 hotel night comes to about ¥11,600.
This post covers today’s rate, what a day in Seoul costs in yen, whether to exchange now or wait, where the best rate is, and how to handle cash and cards in Korea.
100 JPY to KRW Today: How Many Won Do You Get?
As of September 24, 2026, the daily reference rate puts 100 JPY at ₩862, down 3% from a week earlier.
The week before, 100 JPY bought about ₩888–889, so the same ¥50,000 returned ₩444,250 then and ₩431,000 now — ₩13,250 less.
The rate moves 24 hours a day on weekdays, so check the date and source before you act on any number you see.
Bank rates differ by institution: Korea Eximbank’s September 23 figures show a mid rate of ₩864, a wire-buy rate of ₩872 and a wire-sell rate of ₩855 per 100 JPY.
Before exchanging a meaningful amount, check which date and which institution a quoted rate comes from — ₩864 and ₩862 describe different sources on different days, and one page (koreankorea.com’s JPY→KRW page) rebuilds every morning with the daily reference rate and Korean bank buy/sell rates.
If you need the live number, use a page dated today; a rate quoted without a date is not usable.
| 69-day high | ₩959 |
|---|---|
| 7 days ago (about) | ₩888–889 |
| Eximbank mid, Sept 23 | ₩864 |
| September 24 (daily reference rate) | ₩862 |
| 69-day low | ₩854 |
What a Day in Seoul Costs in Yen at Today’s Rate
At today’s rate of about ₩8.613 per ¥1, a ₩10,000 subway ride or casual meal comes to about ¥1,160, and a ₩100,000 hotel night comes to about ¥11,610.
| Won price | What it buys | Yen cost at ₩8.613/JPY |
|---|---|---|
| ₩10,000 | Subway ride or casual meal | ≈ ¥1,160 |
| ₩100,000 | One hotel night | ≈ ¥11,610 |
The calculation is straightforward: divide the won price by ₩8.613, so ₩100,000 ÷ 8.613 ≈ ¥11,610.
The ₩10,000 figure is an illustration of a typical small expense, not a verified fare — check actual fares and prices separately.
Budget roughly ¥1,200 per small expense and ¥11,600 per ₩100,000, then add 10–20% headroom because the rate on your card statement may differ from the reference rate.
If the yen strengthens further, these yen costs fall; if it weakens, they rise — so recheck the rate the day you pay.
Should You Exchange Now or Wait?
No one can tell you the rate will not fall further — over the past 69 days, 100 JPY has moved between a high of ₩959 and a low of ₩854, a swing equal to 12.2% of the low.
The current ₩862 sits near the bottom of that range, and the recent 3% drop has no confirmed forward outlook behind it.
Since the rate moves around the clock on weekdays, waiting for a specific number is a bet, not a plan.
If your trip is within days, exchanging a small amount now and the rest in Seoul splits the risk; if your trip is weeks away, the whole 69-day range is still in play either way.
The 3% drop may hold or may revert — the range above is the honest answer, so budget against the middle of it, not against today’s number.
Where to Get the Best Rate: Japan or Korea?
Korean-side exchange usually returns more won per ¥100,000 than exchanging in Japan, and airport booths on both sides are the worst places to change a large amount.
| Provider | Won received on ¥100,000 | Note |
|---|---|---|
| Wise card | ₩871,662 | 0.6% markup |
| Myeong-dong money changers | ₩868,155 | 0.5%–1.5% from mid-market |
| Korean bank branch | ₩858,770 | plus ₩5,000 fee; 1%–2% from mid-market |
| Japanese airport booth | ₩846,231 | Narita/Haneda around 3.5% markup |
| Incheon Airport booth | ₩837,462 | 3%–5% markup |
These markup figures come from secondary sources, so treat the order as more reliable than the exact percentages.
Incheon Airport booths, at roughly ₩34,000 less on ¥100,000 than a Wise card, are for emergencies only — change the minimum there tonight and move the rest to Myeong-dong the next morning.
Cash, Cards and What Yen Cannot Do in Korea
Japanese yen is not accepted as payment anywhere in South Korea, so it has to be exchanged before or upon arrival.
Korea is heavily cashless, but street stalls and markets often take cash only, and cash also lets you bargain — published estimates put a 2%–4% foreign transaction fee on overseas card use, on top of the card network’s own rate.
Multi-currency cards such as Wise or Revolut let you convert at the mid-market rate in the app and withdraw won from Korean ATMs (7-Eleven, post offices, Global Blue) — exact per-withdrawal fees at Korean banks are not confirmed, so check your card’s terms.
Korean money changers may refuse worn or torn yen notes, so bring crisp, undamaged bills.
Carry a modest amount of cash for stalls and markets, pay larger costs by card, and keep your yen notes flat and clean in a folder rather than a pocket.
Exchanging in Japan Before the Trip
Exchanging only a small amount in Japan — about ¥10,000–¥20,000 worth for arrival — and the bulk at a Myeong-dong changer in Seoul usually returns the most won.
One option in Japan, since July 2025, is the Osaka Station Building’s ‘Gaika Shop’, which advertises yen-to-won exchange at the real-time rate with zero commission and next-day shipping across Japan; a July 2025 press release example put ₩1,000,000 worth at about ¥106,600 there versus about ¥123,000 at banks and airports — about ¥16,400 saved.
That example and the shop’s current status as of September 2026 are unverified, so confirm it still operates before relying on it.
Japan Post Bank is another published option with competitive rates at post offices; compare its posted rate against the daily reference rate on the day you go.
Split the exchange instead of doing it all in one place: a little for the airport, the rest in Seoul — and if the Myeong-dong rate on the morning board looks worse than the reference rate by more than about 1.5%, try a second changer down the street.
If I were changing yen for a Korea trip, I would convert only ¥10,000–¥20,000 worth for arrival in Japan and take the rest to Myeong-dong, because the spread there is the smallest of the options I checked.
My first check each morning would be the changer’s board against the reference rate — if the gap is over about 1.5%, I would simply walk to the next shop.
Related posts
📎 Seoul — everything we know
📎 📅 Upcoming Dates — Release & Event Calendar
Sources
- Confirmed koreankorea.com daily-rebuilt JPY→KRW page with EC (koreankorea.com)
- In brief.md: mid ₩864 / tts ₩872 / ttb ₩855 per 100 JPY (202 (koreaexim.go.kr)
- Wise mid-market ¥1 = ₩8.613, conversion table (wise.com)
What to Do Next
- Bookmark the koreankorea.com JPY→KRW page, which rebuilds every morning with the daily reference rate and Korean bank buy/sell rates.
- Exchange ¥10,000–¥20,000 worth before departure and the bulk at a Myeong-dong money changer in Seoul.
- Never change a meaningful amount at Incheon Airport booths — 3%–5% markup, emergency use only.
- Bring crisp yen bills; Korean changers may refuse worn or torn notes.
- Keep some cash for street stalls and markets, and expect 2%–4% foreign transaction fees on regular overseas cards.
FAQ
Q. How many won does 100 JPY buy today?
As of September 24, 2026, the daily reference rate put 100 JPY at ₩862, down 3% from a week earlier. The rate moves daily, so check a dated source on the day you exchange.
Q. Is now a good time to exchange JPY for KRW?
Over the past 69 days the rate ranged from ₩854 to ₩959 per 100 JPY, and today’s ₩862 sits near the low end. No reliable forecast exists, so split your exchange rather than betting on a direction.
Q. Should I exchange yen before the trip or in Korea?
Exchanging a small amount (about ¥10,000–¥20,000 worth) before the trip and the bulk at Myeong-dong money changers in Seoul usually returns the most won. Airport booths on either side are the worst option for large amounts.
Q. What does a ₩100,000 hotel night cost in yen?
At ₩8.613 per ¥1 (September 25, 2026, mid-market), about ¥11,610. A ₩10,000 meal or subway-style small expense comes to about ¥1,160.
Q. Can I pay with Japanese yen in Korea?
No. Japanese yen is not accepted as payment anywhere in South Korea, so exchange it or use a card that converts to won.
Check the dated rate the morning you exchange, and split the exchange: a little at arrival, the rest at a Myeong-dong changer.
Cover photo: AI-generated illustration (korean won banknotes) — AI-generated image, illustrative only
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