A traveler fumbles for change in a pocket, pulls out a coin that feels roughly the same weight as a hundred yen piece, slots it into a vending machine, and watches the machine spit it back. The coin is a five hundred yen piece, worth about four times the hundred yen, but the machine refuses it because it's an older design. This scenario — an older five hundred yen coin weighing nearly the same as a hundred yen piece — is a common frustration for visitors. In 2023, a Reddit user on the JapanTravel subreddit described buying a drink from a vending machine near Asakusa, only to have his 500 yen coin rejected three times before a local pointed out the date. The coin was from 1992, silver-colored, and the machine only accepted the newer bi-metallic design. The traveler ended up using a 1,000 yen note instead, leaving him with a pocketful of small change he couldn't use elsewhere.

The ¥500 Coin That Baffles Tourists and Vending Machines Alike

Japan's largest coin by denomination is the five hundred yen piece, worth roughly US$3.30 as of late 2024. It's also one of the most confusing. The current bi-metallic design, introduced in 2000, has a gold-colored center and silver rim. But older five hundred yen coins from 1982 to 1999 are still in circulation — they're silver all over, with a different edge pattern. To a foreign eye, the two look completely different, yet both spend the same. The older ones, however, are often rejected by vending machines, ticket machines, and coin lockers.

Some vending machine operators have updated their machines to accept both types. Many have not. The problem is worse in rural areas and older train stations. A traveler who receives an older five hundred yen coin as change might find it useless until they reach a bank or a manned ticket counter. The coin's weight, by the way, is nearly identical to the hundred yen piece: 7.0 grams versus 4.8 grams. In a dark pocket, they're easy to mix up. The result is a small but real hassle — a machine refuses payment, the traveler fumbles, and a queue builds behind them.

Locals know to check the date and edge of a five hundred yen coin before using it in a machine. Tourists rarely do. The simplest workaround is to use larger bills — one thousand yen notes are accepted by almost every machine — and save coins for human transactions. Another tip: keep a separate coin pouch for older coins and use them at stores with a cashier, not at vending machines. The distinction matters more than most guidebooks acknowledge.

Why ¥1,000 Notes Get Swallowed but ¥10 Coins Get Spit Out

Paper currency in Japan is universally accepted by machines. One thousand yen notes work in vending machines, ticket vending machines, and even some toilets. Coins, by contrast, are a minefield. The ten yen coin is accepted by most machines. The five yen coin, with its distinctive hole, is often rejected. The one yen coin, also with a hole and very light, is frequently refused by ticket machines and some vending machines. The reason is partly mechanical: machines are calibrated for certain weights and thicknesses, and the smaller coins fall outside tolerance.

The five yen coin is especially problematic. It weighs 3.75 grams and has a hole in the center. Many vending machines simply don't recognize it. A traveler who pays with a handful of five yen coins at a ticket machine may find half of them returned. The same applies to one yen coins. The result is that a pocketful of small change can be nearly useless for automated purchases. Locals tend to unload small coins at convenience stores, where a human cashier can count them, or at donation boxes at shrines.

The practical advice for visitors: always carry a few one thousand yen notes for vending machines and ticket machines. Keep hundred yen and five hundred yen coins for situations where notes are too large. And don't bother hoarding one yen or five yen coins for machine use — they'll likely be rejected. A small coin purse with separate compartments helps. Some travelers adopt the habit of spending small coins immediately at any human-staffed register, which keeps the wallet light and avoids the frustration of a machine spitting them back.

The Hidden Spread at Currency Exchange Counters

Currency exchange in Japan carries spreads that can eat up a noticeable portion of a traveler's budget. Airport kiosks typically charge a commission of 3 to 5 percent above the interbank rate. The exact number varies by airport and operator. Narita and Kansai airports have multiple exchange counters, but none offer rates as good as what you'd get at a bank in central Tokyo. Post offices, surprisingly, often give near-market rates with low or no commission. Japan Post's exchange service is reliable and used by locals for international remittances.

ATMs are a better option for most travelers. Seven Bank ATMs, found in every 7-Eleven convenience store, accept foreign cards and charge a flat fee of roughly 110 yen per withdrawal (as of early 2025). The exchange rate is set by Visa or Mastercard, which is close to the market rate. Japan Post Bank ATMs also accept foreign cards, though some have limited hours. Bank ATMs in city centers often work as well. The key is to avoid hotel exchange desks and train station counters, which routinely offer the worst rates.

Some travelers bring U.S. dollars or euros and exchange them at a post office upon arrival. Others rely entirely on card withdrawals. Both approaches work, but the spread at airport kiosks is steep enough to justify a short walk to a post office or a 7-Eleven ATM. A practical tip: withdraw a larger amount in one go to minimize the per-transaction fee. For a two-week trip, a single withdrawal of 50,000 to 100,000 yen covers most cash needs. Keep the rest on a card for larger purchases.

Consider the experience of a traveler from Australia who arrived at Narita with AUD 500 in cash. The airport exchange counter offered a rate of 78 yen per Australian dollar, while the interbank rate was 82 yen. That's a loss of about 2,000 yen — enough for a decent meal. A 15-minute train ride to a post office in Tokyo would have saved that amount. Another common mistake is exchanging too much cash at once. If you exchange a large sum at a poor rate, you're stuck. Better to start with a small cash amount and rely on ATMs for the rest.

SIM Cards Sold at Convenience Stores Don't Work in All Phones

Japan's mobile network uses LTE bands that differ from those in the United States and Europe. A prepaid SIM card bought at a convenience store — such as those from IIJmio or BIC SIM — requires an unlocked phone that supports the right bands. Some phones sold in the U.S. on carrier contracts are locked, as noted by many online forums, though the exact proportion is hard to verify. Even unlocked phones may lack band 19 or band 21, which are common in Japan. The result is a SIM that the phone detects but cannot register on the network.

Some tourist SIM cards also block tethering, meaning you can't share the connection with a laptop or tablet. This is a common restriction on cheaper prepaid plans. Pocket WiFi rentals, available at airport counters and online delivery services, are more reliable for groups or anyone needing to connect multiple devices. A typical pocket WiFi device costs roughly 500 to 800 yen per day and offers unlimited data with a stable connection. The downside is that you need to charge it daily and return it before departure.

Before buying any SIM, check your phone's compatibility on a site like FrequencyCheck or the carrier's own list. If your phone is locked or uses an unusual band set, a pocket WiFi is the safer bet. Alternatively, some travelers buy a SIM at a Bic Camera or Yodobashi Camera store, where staff can check compatibility. Convenience stores are fast but impersonal — the clerk won't know whether your phone works. A small investment in research before the trip saves a lot of frustration on arrival.

An anecdote from a 2024 travel blog: a Canadian traveler bought a IIJmio SIM at a FamilyMart in Shinjuku, inserted it into his iPhone 12, and got no signal. The clerk couldn't help. He later discovered his phone was locked to Rogers. He ended up renting a pocket WiFi at the hotel for 700 yen per day. The SIM cost 3,000 yen and went unused. The lesson: check your phone's unlock status before departure, and consider pocket WiFi as a backup.

Tap Water Is Drinkable but Fountains Are Scarce

Japan's tap water is safe to drink by international standards. Tokyo's water meets World Health Organization guidelines, and most municipalities treat and test their supply rigorously. However, public drinking fountains are surprisingly rare outside of parks, temples, and some train stations. In central Tokyo, a traveler can walk for blocks without finding a place to refill a bottle. Convenience stores sell bottled water for 100 to 150 yen, but the cost and plastic waste add up.

Some JR train stations have water refill stations near the restrooms. These are marked with a tap and a small sign, often in Japanese only. A few newer stations, like Tokyo Station's Marunouchi side, have dedicated bottle-filling taps. Parks like Yoyogi Park and Ueno Park have fountains, but they may be turned off in winter. The practical reality is that most locals buy bottled water or carry a thermos filled at their hotel. Hotels almost always have potable tap water, and many provide a kettle for boiling.

For a traveler, the best strategy is to carry a reusable bottle and refill it at the hotel each morning. If the bottle runs dry during the day, buy a small bottle at a convenience store and reuse it. Avoid drinking from streams or temple water basins unless there's a clear sign — some are treated, some are not. The scarcity of fountains is a minor inconvenience, but one that's easy to manage with a little planning.

During summer, dehydration is a real risk. In July 2023, a tourist in Kyoto collapsed from heat exhaustion after walking for two hours without finding a water fountain. He was treated at a clinic and recovered, but the incident underscores the need to carry water. Many travelers underestimate how much they'll need, especially in humid weather. A reusable bottle with a capacity of at least 500 ml is recommended, and refilling at convenience store restrooms (which often have potable water) is a viable option if you ask permission.

The Paperwork Trap: Foreign Address on Shipping Labels

Japan Post requires a local address for any parcel sent within the country. For a traveler trying to ship a package to themselves or to a friend, this is a common sticking point. A hotel address is acceptable for small packages, but the recipient's full name must match the hotel registration. Larger items, like a suitcase or a box of souvenirs, may need a more permanent address. Customs forms for international shipments must list contents in Japanese or with a Japanese translation attached — English-only forms are often returned.

Post office staff in urban areas have some English ability, but in smaller towns they may not. The Japan Post counter at a major station like Tokyo or Shinjuku has staff who can handle foreign customers, but expect a slower process. For shipping large items, services like Yamato Transport (often called Kuro Neko, meaning "black cat," due to its logo) offer a more tourist-friendly option: they can send luggage from hotel to hotel or to the airport. The service costs roughly 1,500 to 2,500 yen per suitcase, depending on size and distance, and the forms are simpler.

A related trap: if you buy a large item at a store and ask them to ship it to your home country, the store may require a local address for the initial leg. Some stores, especially electronics shops, have a minimum purchase threshold for free shipping. The paperwork can eat up a surprising amount of time. Allow at least 30 minutes for any post office transaction, and bring a printed copy of your hotel address in Japanese. This small preparation avoids the frustration of a rejected parcel.

For example, a traveler from the UK bought a ceramic tea set at a department store in Kyoto. The store offered to ship it to her home, but required a Japanese address for the domestic leg. She used her hotel address, but the package was delayed because the hotel's name wasn't clearly written. The tea set arrived at the hotel two days after she checked out. The hotel forwarded it, but the cost was higher than expected. A clearer address label would have saved the trouble.

What Locals Do That Tourists Don't: The Shoe Rule and the Chopstick Etiquette

Two social rules catch more tourists off guard than any other. The first is the shoe rule: in any home, many traditional inns (ryokan), and some restaurants, you remove your shoes at the entrance (genkan) and step up into the interior in socks or slippers. Slippers are provided for indoor use, but they are not worn outside the room — and there are separate slippers for the toilet. Wearing indoor slippers into the toilet area is a common mistake. The rule is simple: change to toilet slippers at the bathroom door, then change back when you leave.

The second rule involves chopsticks. Never stick chopsticks vertically into a bowl of rice — this mimics a funeral ritual where rice is offered to the dead. Also, never pass food from your chopsticks to someone else's chopsticks. That, too, is a funeral custom: at cremations, family members pass the bones from chopsticks to chopsticks. The safe practice is to place food on the other person's plate, not directly into their chopsticks. These rules are deeply ingrained in Japanese culture, and breaking them can cause quiet discomfort.

Many tourists never learn these rules because guidebooks often skip them or mention them in passing. Locals rarely correct a foreigner directly, so the mistake goes unnoticed by the visitor but is remembered by the host. The practical advice: when entering a Japanese-style accommodation, watch what others do. If there's a step-up from the entrance, shoes come off. Use the provided slippers, and never wear them into a tatami room — tatami is walked on in socks or bare feet. For chopsticks, use them to pick up food from shared plates using the opposite ends (the clean ends) if available, or ask for serving chopsticks.

These small courtesies are not about perfection; they're about showing respect. A traveler who observes them will find interactions smoother and warmer. The alternative is a series of awkward moments that could have been avoided with a few minutes of awareness. As one expat blogger noted, "The first time I used chopsticks to pass food to a friend at a dinner party, the room went silent. Nobody said anything, but I could feel the discomfort. I later learned why." That kind of memory sticks. Better to learn the rules beforehand than to discover them through a faux pas.

For the shoe rule, a common mistake is wearing indoor slippers onto tatami mats. Tatami is delicate, and slippers can damage it. Always remove slippers before stepping onto tatami. Some ryokan provide special tatami slippers, but they are the exception. When in doubt, go barefoot or wear socks. Another tip: if you see a row of shoes at an entrance, it's a clear sign to remove yours. Don't step onto the raised floor with your shoes on, even for a moment. The genkan is the only place for shoes.

With chopsticks, a safe approach is to use the opposite ends (the ends that haven't touched your mouth) to pick up food from shared plates. If the restaurant provides serving chopsticks, use those. When you're not eating, rest your chopsticks on the chopstick rest (hashioki) or on the edge of your plate. Don't cross them or point them at someone. These small gestures signal that you've taken the time to understand local customs, and they are appreciated.