The certificates, which substitute for health insurance cards, can be used for up to five years and are subject to renewal. They can be sent to the residents via postal mail, among other methods. When using the My Number card integrated with health insurance data, the cardholder will have to scan it using a card reader at a medical institution, with their identity verified by entering a four-digit code or through facial recognition. The number of people who have already registered their My Number cards as their health insurance cards has reached 77.47 million, or 82 percent of the total holders as of the end of October, according to the Ministry of Health, Labor and Welfare.