Landing at Narita or Haneda, the first thing many travelers see is a row of currency exchange counters promising convenience. But convenience has a price — often a steep one. On a recent trip to Tokyo, I watched a traveler exchange ¥100,000 at an airport booth and walk away with roughly ¥88,000 worth of spending power. A 15-minute train ride to Shinjuku Post Office later, the same amount would have yielded closer to ¥97,000. That gap, roughly ¥9,000, is enough for a decent meal or a day's transport. This article runs the numbers on where to exchange yen in Japan, why post offices beat banks and airports, and what to do when you arrive outside business hours.

Airport Counters Take a 10–15% Cut on Yen – Shinjuku Post Office Takes Under 3%

Currency exchange at Tokyo's airports is notoriously expensive. At Narita, spreads on major currencies like the US dollar, euro, or Australian dollar typically range from 8% to 12% above the mid-market rate. Haneda is slightly better — some counters offer spreads around 6–8% — but still far from competitive. For a traveler exchanging ¥100,000, that means losing roughly ¥8,000 to ¥12,000 compared to the wholesale rate. For larger amounts, the absolute loss grows proportionally.

In contrast, the Shinjuku Post Office — officially the Shinjuku Branch of Japan Post Bank — consistently offers spreads of 2–3% for amounts over roughly ¥50,000. On ¥100,000, the loss is about ¥2,000–3,000. The difference is stark: roughly ¥6,000–9,000 saved by walking a few minutes from Shinjuku Station instead of exchanging at the airport. That saving could cover a night in a budget capsule hotel or several days of local train fares.

Why are airport rates so poor? Airport exchange counters operate under high rental costs and captive demand. Travelers arriving late, tired, or unfamiliar with alternatives often accept the rate without comparison. The counters also add a convenience premium — they know many people need cash immediately for taxis, trains, or snacks. But with a bit of planning, that premium is entirely avoidable.

It's worth noting that rates fluctuate daily, and the exact spread depends on the currency pair and the amount exchanged. As of mid-2024, the post office rate for USD to JPY was around 2.5% above mid-market, while Narita's Travelex counter was at 11%. These figures are based on published rate boards and traveler reports; always check the current rate before committing.

Why Post Office Rates Beat Even Tokyo's Banks for Cash Exchange

Japan Post Bank, the banking arm of the postal service, handles foreign exchange without a commission for amounts over roughly ¥50,000. The rate is set daily based on the mid-market rate plus a small margin — typically 2–3%. Major city banks like Mizuho, SMBC, or MUFG may offer similar spreads but often charge a handling fee of ¥500–1,000 per transaction, which eats into the savings on smaller exchanges.

The Shinjuku branch is a full-service post office with a dedicated forex counter. It's open weekdays from 9:00 to 17:00 and Saturday mornings from 9:00 to around 12:30. Sunday and public holidays are closed. That limited window is the main drawback — if you arrive on a Saturday afternoon or Sunday, you'll need an alternative. But for most travelers arriving on weekdays or Saturday mornings, the post office is a reliable option.

Another advantage: Japan Post Bank updates its rates daily, and they are publicly displayed. You can check the rate board before deciding. There's no negotiation, no hidden fees — just the spread. For larger amounts, say ¥200,000 or more, some travelers report that the post office rate improves slightly, though the difference is usually within 0.5%. Banks, on the other hand, may require an account to get the best rate, and the counter staff may not be as accustomed to serving tourists.

One caveat: the post office only exchanges cash, not traveler's cheques. And they prefer notes in good condition — torn or heavily creased bills may be refused. Bring crisp, clean currency from your home country to avoid issues. Also, the post office does not exchange all currencies; major ones like USD, EUR, AUD, GBP, and CNY are fine, but less common currencies may require a bank.

The Shinjuku Branch Is Not Alone – But It's the Most Convenient Hub

Shinjuku Post Office is not the only option. Tokyo Central Post Office, near Tokyo Station, offers similar rates and is convenient for those staying near Marunouchi or the Imperial Palace. Osaka's Umeda Post Office serves the Kansai region with comparable spreads, making it a good alternative for travelers arriving at Kansai International Airport. However, the Shinjuku branch stands out due to its location: a 5-minute walk from JR Shinjuku Station's east exit, right next to the bus terminal and the Shinjuku Gyoen park.

Rural post offices may have forex availability but often with limited hours and smaller cash reserves. It's wise to call ahead if you plan to exchange in a small town. In Tokyo, the Shinjuku branch is the most tourist-friendly, with English signage and staff accustomed to foreign visitors. The line can be long during lunch hours, so aim for mid-morning or early afternoon.

For travelers staying in other neighborhoods, the post office near Ueno Station or Shibuya also offers competitive rates, though Shibuya's branch is smaller and may have shorter hours. The key is to avoid airport counters and seek out a Japan Post Bank branch — there are over 20,000 post offices nationwide, but forex services are concentrated in major city branches. Check the Japan Post Bank website for a list of forex-handling branches.

One more tip: the post office rate is often better than the rate at major department store exchange counters like those in Mitsukoshi or Takashimaya. Those department store counters cater to tourists but typically have spreads of 5–8% — better than airports but worse than post offices. Stick with the post office for the best deal on cash.

ATMs in Japan: 7-Eleven and Japan Post Bank Are Your Fallback

When the post office is closed, ATMs are the next best option. 7-Eleven convenience stores have ATMs that accept foreign cards — Visa, Mastercard, American Express, and UnionPay — with a flat fee of roughly ¥110 per withdrawal. The exchange rate is near the wholesale rate, typically within 0.5% of mid-market. For small amounts, the ¥110 fee is negligible, making ATMs cheaper than any counter for withdrawals of ¥10,000 or less.

Japan Post Bank ATMs are also reliable and widely available, with similar fees and rates. The withdrawal limit is typically ¥50,000 per transaction, though some ATMs allow up to ¥100,000. Airport ATMs often have lower limits — around ¥30,000 — which can be inconvenient if you need a larger sum. For a ¥50,000 withdrawal at a 7-Eleven ATM, the total cost is roughly ¥110 plus the spread, which is far less than the ¥4,000–6,000 you'd lose at an airport counter.

One important note: not all ATMs accept foreign cards. Avoid ATMs at Japan Post Bank that are marked "International ATM" — those are for domestic cards only. Look for the "International" logo on 7-Eleven ATMs or the "Plus" or "Cirrus" logos. Also, inform your home bank before traveling to avoid card blocks. Some banks charge a foreign transaction fee of 1–3%, which adds to the cost. Consider using a card with no foreign transaction fees, like a Charles Schwab debit card or a Revolut card.

ATMs are available 24/7 at convenience stores, making them ideal for late arrivals. The exchange rate is set by your home bank's network, not the ATM operator, so the rate you see on the screen may differ slightly. Always choose to be charged in yen (local currency) rather than your home currency to avoid dynamic currency conversion fees, which can add 3–5%.

Prepaid Travel Cards and Digital Wallets Sidestep Cash Altogether

Increasingly, travelers are avoiding cash entirely. Suica and Pasmo IC cards are rechargeable smart cards accepted on trains, buses, convenience stores, vending machines, and even some restaurants. They can be loaded with yen at ticket machines using cash or credit cards. The exchange rate on credit card loading depends on your card issuer, but it's often better than cash exchange. Suica cards are available at airport train stations and can be refunded with a small fee.

Digital wallets like Wise and Revolut offer mid-market exchange rates with a fee of 0.5–1% on yen conversion. You can load the card with your home currency and spend in yen at the live rate. These cards work at most ATMs and contactless terminals. However, some Japanese merchants still prefer cash, especially in rural areas or small shops. Always carry some yen as backup.

Alipay and WeChat Pay are accepted at many tourist-oriented shops, hotels, and restaurants in Tokyo, Osaka, and Kyoto. But don't rely on them exclusively — smaller establishments and street vendors often take cash only. Prepaid travel cards from Travelex or JTB may have hidden reload fees of ¥200–500 per top-up, so read the terms carefully. Overall, a combination of a Wise card for daily spending and a post office cash exchange for backup is a solid strategy.

One more option: some travelers use their home bank's debit card at Japanese ATMs and accept the foreign transaction fee. If your bank charges 1% and the ATM charges ¥110, that's still cheaper than a 10% airport spread for amounts over ¥10,000. Do the math for your specific cards before leaving.

The Real Cost of Convenience: How Airport Markup Adds Up Over a Trip

Let's put the numbers in perspective. A typical two-week trip to Japan might involve spending ¥200,000 in cash — for meals, local transport, souvenirs, and entry fees. If you exchange that entire amount at an airport counter with a 10% spread, you lose ¥20,000. At a 3% post office spread, you lose ¥6,000. The difference of ¥14,000 is enough for a night in a budget Shinjuku capsule hotel (around ¥4,000–6,000) plus several days of meals from convenience stores (¥500–1,000 per meal).

Over a 10-day trip, that ¥14,000 saving could cover a day trip to Kamakura or Nikko, including train fare and lunch. Or it could buy a decent pair of second-hand kimono at a flea market. The point is: the airport markup isn't a small nuisance — it's a real drain on your travel budget that can be redirected to experiences.

Of course, not everyone can reach a post office during business hours. Travelers arriving on a late-night flight or a Sunday have limited options. In those cases, exchanging a small amount at the airport — say ¥20,000 — to cover immediate needs, then heading to a post office the next morning, minimizes the loss. Alternatively, use an ATM for the first withdrawal and exchange the rest later.

Some travelers argue that the convenience of airport exchange is worth the premium — especially if they're tired, in a hurry, or unfamiliar with the city. That's a valid perspective. But for those willing to spend an extra 20 minutes, the savings are substantial. As with many things in travel, a little planning goes a long way.

Trade-Offs and Counter-Arguments: When the Post Office Might Not Be Best

While the post office offers excellent rates, it's not always the optimal choice for every traveler. Consider these scenarios where an alternative might make more sense:

1. You arrive late at night or on a Sunday. The post office is closed, and you need cash immediately. In this case, exchanging a small amount at the airport (say ¥10,000–20,000) to cover a taxi or dinner is practical. The loss is limited, and you can exchange the bulk later. Alternatively, use a 7-Eleven ATM, which works 24/7 and gives near-market rates. The trade-off: the ATM may have a withdrawal limit of ¥30,000–50,000, and your home bank may charge a foreign transaction fee. But for small amounts, it's still cheaper than the airport counter.

2. You are only in Tokyo for a single day on a tight schedule. If your itinerary is packed and you can't spare 20 minutes to visit a post office, the convenience of an airport exchange might be worth the premium. However, consider that many post offices are near major train stations — Shinjuku Post Office is a 5-minute walk from the station — so you might pass one anyway. Weigh the cost of your time against the savings: if you earn ¥10,000 per hour at work, spending 20 minutes to save ¥6,000 is a good deal.

3. You need to exchange a very small amount (under ¥10,000). The post office spread of 2–3% on a ¥5,000 exchange means losing only ¥100–150. The airport spread of 10% would lose ¥500. The absolute difference is small — ¥350–400 — which may not justify a detour. In this case, using an ATM with a ¥110 fee might be simpler, or even exchanging at the airport if you are already there. But for most travelers, the post office still wins for any amount over ¥10,000.

4. You are exchanging a non-major currency. The post office handles major currencies well, but if you need to exchange Thai baht, Indonesian rupiah, or Brazilian real, you may need a bank like Mizuho or a specialized exchange counter in places like Shinjuku's Takashimaya department store. These banks may charge higher spreads or fees. Check ahead — the Japan Post Bank website lists accepted currencies for each branch.

Another counter-argument: some travelers prefer the certainty of a fixed rate offered by prepaid travel cards like Suica or Wise, which avoid cash exchange altogether. While Suica cards are convenient, they are not accepted everywhere (e.g., some restaurants and rural shops). And Wise cards have a 0.5–1% fee, which is competitive but not always better than the post office's 2–3% spread for cash. For large cash needs, the post office still wins.

Finally, consider the psychological cost: carrying large amounts of cash can be stressful. If exchanging ¥200,000 at the post office makes you uncomfortable, you might prefer using ATMs multiple times to withdraw smaller amounts. That's fine — just be aware of ATM fees and limits. The post office is best for a single large exchange, but ATMs offer flexibility.

In summary, the post office is the best option for most travelers exchanging moderate to large amounts of cash on weekdays. For late arrivals, small amounts, or non-major currencies, alternatives like ATMs or bank counters may be more practical. The key is to plan ahead and choose the option that fits your specific itinerary and comfort level.

For more cost-saving travel math, check out our article on Nairobi hostel math or Sri Lanka train fare tricks. The principle is the same: avoid the default option, do the arithmetic, and keep your money for what matters.