Shinichi Uchida, Deputy Governor of the Bank of Japan, said that if stablecoins become widely used in society, their relationship with deposits could become an issue, according to the source. The reported concern centers on the "singleness" or uniformity between stablecoins and bank deposits, a concept tied to whether different forms of money are treated as equivalent in everyday payments. In central banking and payment system discussions, this matters because confidence in money often depends on users being able to transact across instruments without uncertainty over value or settlement.