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[Wuhan pneumonia in Japan] The Japanese contact tracing APP "COCOA" event book with constant problems from beginning to end

Apr 17, 2021

The Japanese version of the contact tracing app "COCOA" has been controversial since it hit the road. This site from

Until now, we have continued to track and update the current situation of COCOA. COCOA, which has had constant problems from beginning to end, has ushered in the biggest crisis since its launch half a year after its launch...

2021.2.3: Ministry of Health, Labour and Welfare apologizes

This afternoon, Minister of Health, Labour and Welfare Kenhisa Tamura held a press conference to apologize to the public. The reason is that the Android version of COCOA has been buggy since the end of September 2020, and there is no way to operate it.

During this period of time, people who downloaded COCOA on Android phones (about 30% of Android users) have never been able to receive notifications. That is to say, in the past 5 months, even if Android users have been in contact with people diagnosed with COVID-19, they both use COCOA, and the other party has a good sense of publicity to report their diagnosis on COCOA, but Android users have never been Did you get a notification?

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In fact, a few days ago, there were many people on Twitter who shared a little story. A Twitter user was diagnosed. After he was diagnosed, he stayed in an anti-epidemic hotel for recuperation. He would keep posting some stories about him in the anti-epidemic hotel (the content of the story is very classic, everyone will roll their eyes after reading it, but I will omit this part for now. ), and his account became so famous.

Just after he stayed at the anti-epidemic hotel for a long time (his account has been followed by many people), he said on the PO one day that he was afraid of infecting his family because he was living with his family, so he stayed at the hotel. Inside the quarantine hotel. Everyone in their family has downloaded COCOA on their mobile phones. After he was diagnosed, he immediately reported on COCOA that he was diagnosed, but his family’s mobile phone COCOA never notified them that they had been in contact with confirmed patients.

When I saw this story, I was still thinking, although it is a family living together, but it should be possible~ Because COCOA's system setting is that the mobile phone is within 1 meter for more than 15 minutes, if everyone uses different rooms at home If the sockets at both ends of the room are charged separately, and the distance between the mobile phones is always kept more than 1 meter, even if the distance between family members is less than 1 meter, there will be no record. But seeing this news today, I think they all use Android phones at home...

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Anyway, the Ministry of Health, Labour and Welfare said they expect to fix all the bugs by mid-February. The Minister of Health, Labour and Welfare also said that they will find bugs this time, because there are many people on the social networking site who seem to react strangely, and they notice that there is really a bug. In fact, COCOA was only overhauled once in September last year. The reason for the revision is for iOS, which is what I said in this post at the time:

2021.4.17: Incident report released

On February 3 this year, Japanese Minister of Health, Labour and Welfare Kenhisa Tamura held a press conference to apologize to the public. The reason is that the Android version of COCOA has been buggy since the end of September 2020, and there is no way to operate it.

Yesterday (16) the Ministry of Health, Labour and Welfare released a review report. The report pointed out that the reason why the Android version of COCOA has been buggy since the end of September last year, and it was not discovered and corrected until February this year is that the staff of the Ministry of Health, Labour and Welfare are not familiar with the system development and leave it to the industry. , In addition, the IT company responsible for contracting this business was in a hurry at the time, and the work was dispatched. The business responsibility between the contracting companies was unclear, and there were other bugs that had to be dealt with at that time, which led to the development of Initial system testing was not really done well.

The timing goes back to last year.

Responsible units from the Cabinet Secretariat to the Ministry of Health, Labour and Welfare

At the earliest, when the Japanese government wanted to make a " contact tracing APP ", it was jointly developed by the COVID-19 Infectious Disease Countermeasure Tech Team of the Cabinet Secretariat and Code for Japan, a Japanese citizen technology organization.

But when it was decided in May last year to use Apple and Google to develop Privacy-Preserving Contact Tracing as the basis for the application, according to Apple and Google's regulations, this system could only be provided to public health authorities in various countries, and a country could only have A public health authority applies (in other words, it can only be applied by the central government), so the development of the Japanese version of the "contact notification app" falls to the Ministry of Health, Labour and Welfare.

Time crunch and multiple outsourcing are long-term causes

The Ministry of Health, Labour and Welfare first entrusted the IT company Persol Process & Technology Co., Ltd. to develop the system, but due to time constraints, Persol Process & Technology Co., Ltd. was allowed to outsource the work. In the end, 6 companies were responsible for the development of COCOA, which was later known, but it also planted a long-term cause for the unclear division of labor and responsibility among these companies.

I was too busy and didn’t have time, and when I was free, I forgot to make up

The report pointed out that in the early stage of development, because the equipment for system testing was not perfect, only specific functions were tested. After the official launch, it was found that it did not meet the needs of the public health center, so it had to be adjusted urgently.

By October last year, COCOA was finally on track, but the staff of the Ministry of Health, Labour and Welfare did not know the importance of system testing, so they left these matters to the contractor to handle. It just so happened that COCOA discovered other bugs at that time (COCOA's bugs are really not ordinary), so I always forgot to do the Android version of the system test.

Three problem points, both sides are playing dead and rotten

The report pointed out that there are three problems in this series of incidents:

When the system was updated in September last year, COCOA was put on the road without system testing.
When I have time to do system testing, I did not make additional tests
In November last year, some people pointed out that there was a problem with the system, but they left the bug and no one dealt with it.

The above three problems are all because the Ministry of Health, Labour and Welfare and the industry both believe that "the other party will do this."
The person in charge of the Ministry of Health, Labour and Welfare also admitted that they do not know which tests have not been done, and "have not listened to the industry."

The report concluded that the Ministry of Health, Labour and Welfare did not have relevant professionals for this incident, and there was no manpower to handle the matter at the time. In order to prevent similar incidents from happening again, it is necessary to ensure that the Ministry of Health, Labour and Welfare has sufficient manpower and can clearly grasp the matters that are entrusted to the company.

The contractor returns part of the remuneration voluntarily

After the report was published, Persol Process & Technology Co., Ltd., which can be said to have become one of the critics, said that it would pay a total of 12 million yen in compensation received by the company from the government after August last year. back to the government.

Persol Process & Technology Co., Ltd. has taken over the case since May last year, and will contract the work to 3 other companies, so the cost of returning to the government voluntarily this time is only one of the funds spent by the Japanese government on COCOA part.