NTT Docomo parent NTT Group and KDDI joined a study to assess development of an interoperable framework for digital payments intended to increase uptake of the services in Japan. In a statement, digital currency trader and organiser of the research DeCurret said expectations on cashless transactions have been “growing” and require “direction”. KDDI and NTT Group join Mizuho Bank; MUFG Bank; and Sumitomo Mitsui Banking Corporation on the research group, which DeCurret explained would seek to form a consensus on how to deliver digital payments “and to present a direction...