May 12, 2021 A growing number of people who have recently arrived in Japan are raising concerns that malfunctioning monitoring tools and confusing guidelines may have put them on the government’s blacklist for violating quarantine. Some have experienced problems with reporting their location or health condition, or have been confused as to which rules apply to them and which do not. Arrivals are asked to install a location-tracking app called Overseas Entrants Locator (OEL), with notification messages requesting location information and health status sent on a daily basis during the quarantine period. They are also asked to install other applications, such as one that notifies people of a close contact with those who have been infected. Those who fail to report are individually contacted by a monitoring team affiliated with the health ministry.