After registering by phone number in the free app, users can receive “Dejina Card,” a virtual card for online shopping. A separate “Sotona Card” extends use to participating Visa-accepting shops in Japan; issuing this card may involve a fee. Cards are funded in advance, helping users limit spending to the balance available, and can be topped up in 100-yen increments through options including convenience stores, Seven Bank ATMs, Pay-easy and, subject to a separate provider’s approval, deferred payment.

The app displays transaction details and monthly spending totals, and lets users temporarily pause or resume card use. The service can be used at many Visa-accepting online merchants in Japan and abroad, although some countries and merchants are excluded. Registration is free, with no age limit, but users under 18 need parental or legal-guardian consent.

Issuance may be restricted in cases of suspected misuse or rule violations