
It’s not like we needed it or anything.
Hey everyone, do you remember COCOA?
Of course you don’t. While the most popular answer is probably the beans that make chocolate, in all-caps it’s the COVID-19 Contact Confirming Application, a 41-million-yen (US$390,000) contact tracing app that the Ministry of Health Labor and Welfare released last June.
The way it works is simple: By installing the COCOA app on your smartphone it automatically and anonymously keeps a record of other COCOA users that you come within one meter of for more than 15 minutes. Then, if one of those people tests positive for COVID-19 in the following two weeks, your phone receives a notification that you should get yourself checked out too.
The way it doesn’t work is also simple: For this system to effectively contribute to the reduction of infections, roughly 60 percent of the population would have to have it installed and functioning. This means it would have to be vastly more downloaded than the likes of TikTok, Instagram, and basically any other app in existence, which it made a surprisingly good attempt at.

App Annie Japan crowned COCOA as the most downloaded app of 2020, and according to the ministry it has been downloaded 24.64 million times as of 3 February, 2021. While those numbers would make any app developer drool, it still only amounts to 19.5 percent of the population, in the highly unlikely scenario that each download was made by an individual person and it is still installed on their phone.
I too did my civic duty and downloaded COCOA last summer. There it sat, dormant along with my Stocks and Fitness apps in the “Wasteland” folder.
I never heard so much as a bleep from it since, which I assumed meant I was being super safe during these hazardous times. However, as cases exploded over the winter, some people started noticing that their COCOA apps weren’t pinging even though people they knew were coming down with COVID-19. Others who were infected had trouble registering it in their own app.
As more and more reports of this came into the ministry, an investigation revealed that an update they released last September caused COCOA to not work properly on certain Android devices. Apps on iOS were said to be completely unaffected by the problem, and a fix should be ready by mid-February.
▼ An apology press conference was held by health minister Norihisa Tamura and a densely packed group of reporters.
It is not clear which ones or how many, but Android users account for 31 percent of COCOA downloads. This means as many as 7.7 million COCOA apps might have been rendered useless throughout the entire third wave of infections.
I’m at a loss for words, so let’s see what others had to say:
“…Hey!”
“This…I’m speechless.”
“That’s horrible.”
“Um…Isn’t it too late now?”
“What the hell? I installed COCOA on all my company’s phones, and they’re all Android.”
“Why are they so bad at this?”
“So, it’s okay if Android users get infected?”
“Huh…But if this was such a problem, wouldn’t they have noticed it earlier when the traffic of notifications changed dramatically as a result?”
Indeed, it’s not so much the mistake, since bugs in apps are a part of our daily life, but not noticing something like that for over four months is quite amazing. As the last comment suggested, it means that the problem wasn’t so big, the app isn’t so useful, or both.
Considering about 10,000 of the total 377,000 cases that occurred since COCOA was released were recorded in the app, the answer is pretty clear and we all better start blowing up our inflatable face shields.
Now if you’ll excuse me, I’m going to check if my Stocks app is actually working or not.
Source: NHK, Yomiuri Shimbun, PR Times, Hachima Kiko
Images: ©SoraNews24 (Unless otherwise noted)
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!



Only three COVID-19 infected people registered on Japan’s contact tracing app after a month
Don’t uninstall that Covid-tracking app yet, warns Japanese government
Japanese government is shutting down its COVID contract-tracing app
Travelers entering Japan will have to install location confirmation app, Skype on smartphones
COVID-19 appears to be suppressing the flu in Japan, number of cases down and decreasing
New Japanese overnight train coming to connect Tokyo with Tohoku in sleep-travel style
Universal Studios Japan is giving Frieren anime fans the chance to make unforgettable memories.
7-Eleven Japan has a new Creamy Iced Cafe Latte that’s a hit on social media
7-Eleven Japan releases new “mix-and-drink” matcha latte… that comes with a risk of choking
Sanrio Hotel Floria isn’t actually a hotel, but it’s still a must visit for fans traveling in Tokyo
Two of Kyoto’s famous temples tackle streetside trash with solar-powered trash cans
7-Eleven Japan joins the craze for Korean Gamja Cheese Balls
Starbucks Japan releases special limited-edition summer drinks… at only 30 stores
Lawson transforms convenience store food with massive katsu burger and an insane curry bread
Super Mario Galaxy Happy Meal toys now available at McDonald’s Japan
East Japan Railway announces plans to abolish magnetic-strip tickets
New Square Enix Cafe reveals Final Fantasy, Dragon Quest, Nier, and Fullmetal Alchemist menu items
Japanese rice cooker recipe gives us a tasty new way to enjoy vegetables and wieners
Family Mart commits “reverse fraud” in new Giant All-Star Festival, and we couldn’t be happier
New Tokyo sweets shop offers 648 different mochi ice cream dumpling combinations
Japan’s cheap beef bowl chain goes upscale with Matsuya Premium, but is it worth the higher price?
Even at twice regular Daiso price, this handy item is still great for summer travel in Japan
Ghibli’s No Face continues to demonstrate his generous character growth by dispensing soy sauce
Colour Hunting: The hot new street photography trend changing how we see Japan
Tokyo’s life-size Gundam anime mecha statue will be removed this summer
Kanji ice cream becomes a sell-out hit in Japan
Uniqlo reveals third round of massive 100-year-anniversary manga T-shirts for Jump’s Shueisha
New official Ghibli anime food cookbook will teach you how to make Ponyo’s ramen and more
Ichiraku Ramen-inspired ramen sets from Naruto anime pay homage to Naruto, Sasuke, and Sakura
Japanese convenience store Lawson launches new “mini supermarket” chain, L Minimart
Japan’s real-world Pokémon hot spring’s first photos are here![Photos]
Kyoto public junior high school becomes first in Japan with a hoodie school uniform
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
Japan reportedly adding Japanese language skill requirement to most common foreigner work visa
Japan’s 5.3 million beautiful Hitachi Nemophila flowers are now in full bloom[Photos]
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Young people in Tokyo to be offered points and discounts if they get vaccinated
If you die from the COVID-19 vaccine in Japan, the government will give your family over 44M yen
Up to 300 people a day breaking Japanese quarantine rules, according to reports
Everything you need to know about quarantining in Japan