A Suica works as money at convenience store counters, vending machines, station coin lockers, drugstores, and most Tokyo taxi companies, and the list effectively ends there. Small independent shops, older restaurants, and temple and shrine stalls still run on cash. Load a day or two of small purchases onto the card, keep a folded bill and a pocket of coins in your wallet, and treat the card as speed, not coverage.
The moment I stopped thinking of it as a train card was in front of a wall of coin lockers with a duffel I had no intention of carrying around all afternoon. The panel had a reader instead of a coin slot. I tapped. The door clicked, I wedged the bag in, shut it, tapped again, and the lock threw itself. No key, no token, no paper slip to lose in a jacket pocket. From then on the card was the only thing standing between me and my luggage, which is the useful way to think about it: this is a payment instrument that happens to live on a transit card. Once that clicks, the question stops being where it works and becomes how much of your day you want it responsible for.
What the tap actually buys you
A convenience store counter is the clearest case. You put three things down, the clerk waves a reader at you, you tap the pad, the terminal beeps, and the transaction is over before the receipt prints. There is no insert, no PIN prompt, no signature line, no waiting for an authorization to come back over a slow connection. That whole exchange takes about as long as handing over a coin.
Vending machines are the same idea at smaller scale, and they matter more than people expect. A row of machines on a platform in the rain, a bottle you want, a pad glowing next to the bill slot. Tap, press, thunk. The reason this is worth internalizing is that it removes a decision: you no longer have to check whether you have the right coins before you commit to wanting a drink.
Drugstores, chain coffee counters, the larger supermarkets, the kiosks inside stations: all the same motion. Tap, beep, done.
The top-up that isn't a separate errand
The card refills in two places, and the second one surprises people. Station ticket machines will do it, and those want cash in the slot. So will a convenience store register, which means you can walk in with a nearly empty card, hand the clerk some cash, say you want to charge it, and then pay for the thing in your other hand with the card thirty seconds later. The balance is the balance the instant it lands. Same money, same card, one counter.
That single mechanic is why I stopped pre-loading large amounts. I top up in small amounts, at a register, when the card is running thin, and I never do the arithmetic of a whole trip in advance.
Where the beep doesn't come
Now the other side of the line, because it is a real line and it sits closer than the cashless-Japan stories suggest.
A small soba counter near an older part of town: a laminated menu, a tray on the counter with coins and a few bills already in it, no reader anywhere on the counter or the register. You put your money in the tray. The same is true of plenty of small izakaya with handwritten menus and a mom running the floor, of the ticket-machine ramen shops where the machine takes coins and small bills and nothing else, of the stall at a temple selling amulets, of the wooden box at a shrine where you drop a coin and bow, of the morning market where a vendor weighs something out for you and holds out a hand.
None of these are obscure. They are ordinary places you will walk into without planning to, and each one of them converts your confident little tap into an apology and a search through your pockets.
The second thing people get wrong about cashless
Contactless credit cards are accepted in far more places than they were a few years ago, and the tap-to-pay terminals at registers handle them fine. So the Suica is not your only cashless option, and it is not the only one that skips the signature. If you are choosing between the card and your credit card at a counter, the honest answer is that the difference is small.
The real advantage is narrower and more specific: speed on small purchases, and the fact that a few hundred yen spent on a bottle of water or a rice ball stays off a credit card that may or may not add a foreign transaction fee to each one. Whether yours does is a question for your own bank, not for me. But it is the reason the card earns its place in your pocket rather than being redundant.
The locker rule worth knowing before you load it
A coin locker that takes the card records the card's identifier. Whatever card closed the door is the card that opens it. If you are carrying two cards, or a physical card and the same card on your phone, remember which one you used, because the other one will not open the door no matter how confidently you tap it. Standing in front of a locked locker with the wrong card in your hand is a special kind of stupid feeling, and I have had it.
The older lockers with actual coin slots are still out there, and a few of the oversized ones want cash or exact change. Lockers also bill by the day, and the charge settles when you come back and tap to retrieve your bag, so the card has to have enough on it at the end of the day, not the beginning. That is the one place where running the balance down to nothing can actually strand you.
Taxis, and the limit of "most"
Most Tokyo taxi companies take the card. The reader sits on the partition in front of you, and you tap on the way out, and it is one of the better small pleasures in the city because you are not fumbling for bills while the meter is still technically running.
Most is not all. Outside Tokyo it thins out quickly, and a taxi is precisely the situation where discovering a dead reader is worst: late, tired, luggage in the trunk, driver waiting. This is the single reason I keep a couple of bills in a separate pocket and leave them there. They are not spending money. They are taxi insurance.
The Shinkansen is not a tap
A Suica does not get you onto a bullet train. Tapping the gate with the card alone will not pay for a Shinkansen seat, because the bullet train requires its own ticket, reserved or unreserved, bought separately. The card handles the local legs of the same day perfectly well, which is exactly why people assume it handles the middle of the day too. It doesn't. Buy the Shinkansen ticket; keep the card for getting to the station and getting out of the one you arrive at.
How much to load, how much to carry
Here is the reasoning I actually use, rather than a number.
Leftover balance is mildly annoying to recover. You can get it back at a station office, minus a handling charge, and only with the card in hand. That asymmetry is the whole argument against loading a big round amount on day one: an over-loaded card is a small errand at the end of a trip, while an under-loaded card is a thirty-second top-up at any register. So err low. Load what a day of drinks, snacks, small drugstore runs, and maybe one locker looks like, and reload when it gets thin.
Then carry cash for the other half of the day, in coins and small bills, and expect to spend some of it. The merchant decides which side of the line you are on, not you, and not the card.
That is the actual divide. It is not cashless against cash. It is transactions designed to be tapped and transactions designed around a tray of coins, and you can tell which one you are standing in front of by looking at the counter before you order. Nine times out of ten there is a reader there and the whole thing takes a second. The tenth time, reach for the bills.
