Sumitomo Mitsui Banking Corporation (SMBC) and Ant International signed a memorandum of understanding on October 26, 2026, to explore cross-border payments and digital treasury services. Their initial focus is Japan, Singapore and wider Southeast Asia. Engineering teams will examine whether Ant International’s Whale RTP platform can be integrated with SMBC’s institutional transaction banking and digital asset platforms. The agreement is exploratory, not the launch of a live settlement service. SMBC’s multi-market transaction banking rails are expected to support operations involving Ant International’s Alipay+, Antom and WorldFirst businesses. Ant International says its Whale platform processed more than US$600 billion in global treasury flows in 2025, with over 95% of transactions settling on the same day. Those figures describe the existing platform, not activity under the SMBC agreement. The MoU follows separate tokenized-deposit work involving Ant International and other banks, including a live OCBC solution and an HSBC pilot.