You do not need to buy a game-save card just because you entered a Japanese arcade. First find the machine you want to play and check how it takes payment. Coins, a supported cashless reader and a card used to save progress are different parts of the experience.
That distinction is useful when you see regular players tapping cards before every game. They may be loading their profile, paying, or using a supported service that combines functions. Copying the tap without knowing the reader will not tell you which.
Start with the payment instructions on the cabinet
Taito's official beginner guide describes coin play using the change machines in the store. It also says supported machines can accept electronic money such as Suica and PASMO, with exceptions by location.
Look for the price and the payment logos on the machine you have chosen. A store accepting cashless payment somewhere does not mean every cabinet takes your phone, and buying several credits does not necessarily mean several complete games of every title.
Carry some cash for machines that need coins. Change money in the arcade for playing there, and ask staff if you cannot identify the correct slot. If a payment appears to fail, get help before repeatedly tapping and wondering how many credits you bought.
Taito keeps a cashless-support store list. Use that alongside the branch's machine lineup if a particular game is the reason for your visit.
What an Aime card adds
Aime's official introduction describes saving game data so you can continue next time. Cards are sold at machines in arcades and other participating facilities. Registering the card with the Aime service also supports data transfer if the card is lost or damaged.
That makes a card worth investigating if you expect to return to the same compatible game during your trip. For a quick first play, check whether the game offers a guest option before buying one.
Compatibility belongs to the game and card version. Ask staff which card works with your chosen title; do not assume a card from an arcade back home will work with every Japanese machine. Keep the card's access code private if you register it.
Is a save card also a payment card?
Not automatically. Some supported services add payment functions. SEGA's Aime payment FAQ sends users to the relevant payment operator for eligibility and setup. That is different from an unused plastic card arriving with money on it.
Likewise, a machine accepting Suica for payment does not by itself establish that Suica will save that game's progress. Read the login prompt separately from the payment prompt.
There is also a current change worth knowing if you find older phone-based instructions: SEGA says new Osaifu-Keitai registration as Aime ends December 8, 2026, at 02:00. Existing registered use is treated differently. This concerns the phone's use as an Aime identifier, not a blanket shutdown of arcade cashless payments. Official notice
Pick a game before picking the biggest arcade
A crane-game-heavy floor and a rhythm-game floor offer very different evenings. Check the branch's lineup, then watch a round to see the controls and where people are waiting. If the queue is unclear, 並んでいますか？ (Narande imasu ka?) asks “Are you waiting?”
Start with one play and a difficulty you can enjoy. The people beside you may have spent years on that machine; you came to try it, not reproduce their score on your first credit.
For a Tokyo evening, our Akihabara guide helps you fit arcade time around shops that close earlier.