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 and financial institutions. Originally a batch-processing system, Zengin was upgraded to 24/7 real-time operations in 2018 via the "More Time System" extension. Operated by the Japanese Bankers Association with settlement through the BOJ, it handles the vast majority of Japan's domestic credit transfers. Note: data includes all Zengin transactions (both real-time and batch-processed), as the system does not separately report its 24/7 instant component.