E-Money

E-money is broadly classified into two categories: "transit-based" and "retail-based." Transit-based e-money, such as Suica, PASMO, and ICOCA, is issued by railway companies and can be used both for passing through ticket gates and for in-store payments. Retail-based e-money, such as Rakuten Edy, nanaco, and WAON, is issued by retail companies and features preferential point cashback rates at the issuer's store group.

Charging methods also differ. The four common patterns are cash top-up (at convenience stores or station ticket machines), credit card top-up (via app), bank account top-up, and auto-charge (automatic replenishment when the balance falls below a set amount). Setting up auto-charge eliminates the risk of payment failure due to insufficient balance, making daily use smoother.

The key to using e-money efficiently is choosing the right type for each situation. The basic strategy is to use a transit IC card for commuting and a retail e-money service for everyday shopping at your most-frequented supermarkets and convenience stores. To maximize point cashback, an effective method is to charge from a credit card to earn points on the card side as well - a double-dipping approach.

One important caveat is that e-money balances may have expiration dates. Rakuten Edy expires 4 years after the last use, and nanaco expires 5 years after the last use. Additionally, charged amounts generally cannot be refunded to cash (no withdrawal), so be careful not to charge more than necessary. Balance protection in case of loss varies by service, so it is worth checking in advance.