COCOA Status

Officially provided by the Ministry of Health, Labour and Welfare of Japan (MHLW), COCOA notifies you of close contact with COVID-19 positive users to help the government and healthcare organizations contain the spread of COVID-19.  If you are tested COVID-19 positive and have anonymously registered the positive test result, COCOA will notify users who were within 1 meter for 15 minutes or more during the period of infectivity.  When you are tested COVID-19 positive, please register so in COCOA to notify other users of potential infection.  If the code shared by a COVID-19 positive user matches with a code stored on your device, you will be notified that you have been in close contact with COVID-19 positive user and provide guidance to protect your health.  To visualize the close contacts select it from COCOA or the notifications and you can see the contact period with positive registrants during the last 14 days.  When smartphones with COCOA are in close contact, they exchange random codes which are stored only on the devices.  To receive notifications of close contact , you need to download COCOA and enable exposure notification function on OS settings.  Entering this processing number in COCOA will allow you to register your positive test result.  If you are a close contact, please enter information such as physical condition from COCOA using the symptom input form, and you will be appropriately guided.  COCOA records close contact on Android and iOS devices by using Bluetooth and Exposure Notification API provided by Google/Apple.  Users tested COVID-19 positive, can choose to share the random codes that their devices have sent out.  When healthcare organization registers your positive test results to “The Health Center Real-time Information-sharing System on COVID-19” (known as HER-SYS) provided by MHLW,  a processing number is issued to you.  You can delete close contact history (14 days) anytime by deleting COCOA .  When other smartphones with COCOA receive the radio waves, these will be record in the smartphone.  If it was detected that within the people who came in contact with you there was a positive, you will be notified of the possibility of close contact and guided appropriately.  When you run COCOA, each smartphone generates a random code.