On May 26, 2020, the "New Coronavirus Infectious Disease Countermeasures Technical Team" released a specification that defines the contact confirmation application and related systems that use this API.

After Persol Process & Technology received the project management and maintenance order with a price of 41.04 million yen, it subcontracted it to two companies, including Microsoft Japan and Fixer.

[citation needed] The members include Japanese Microsoft employees, and Persol Process & Technology is responsible for maintenance and adjustments.

The Ministry of Health, Labour and Welfare stated that it will maintain the trial version for about one month after its release (June 19, 2020), revising the design and functions.

As long as the smart phones of both parties are installed with COCOA and Bluetooths are turned on, the devices will record each other's data (identification code) and store it as "contact information".

The Ministry of Health, Labour and Welfare finally published the application link on its official website, and clicked it to go directly to the installation interface.

[citation needed] The Ministry of Health, Labour and Welfare stated that it will stop issuing the processing number required for registration information since July 11 due to "the discovery of a confirmed case of new coronavirus infection that could not be registered in the app".