India vs Japan · Real-time payment systems compared
| Capability | UPI | Zengin |
|---|---|---|
| QR Code Payments | ✓ | — |
| Wallet Support | ✓ | — |
| 24/7 Availability | ✓ | ✓ |
| Cross-Border | ✓ | — |
| ISO 20022 | — | — |
| Request to Pay | ✓ | — |
| Open API | ✓ | — |
| Alias/Proxy | ✓ | — |
Unified Payments Interface is a real-time interbank payment system built on top of IMPS infrastructure, enabling instant mobile payments via QR code, phone number, Aadhaar, or virtual payment address (VPA). With 300+ participating banks and 50+ third-party apps (Google Pay, PhonePe, Paytm), UPI processes 14B+ transactions per month and has become India's dominant payment method for both P2P and merchant payments. Now expanding internationally with cross-border linkages to Singapore's PayNow and other ASEAN systems.
Japan's domestic interbank clearing network, one of the oldest electronic payment systems in the world, connecting over 1,000 banks. Originally batch-only; upgraded to 24/7 real-time in 2018 via the More Time System. Underpins consumer real-time transfers in every Japanese bank's mobile app, any-bank ATM transfers, and the bank-funding legs of major consumer wallets (PayPay, LINE Pay, Rakuten Pay, au PAY). Operated by the Japanese Bankers Association with settlement through the BOJ. Note: data includes all Zengin transactions (real-time and batch-processed).