Was the “80% Contact Reduction” Request the Right Call? 5ch: “Trains Are Protected by Some Mysterious Force”

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The story

In April 2020, during the first wave of COVID-19 in Japan, Hokkaido University professor (now a Kyoto University professor) Hiroshi Nishiura repeatedly urged the public that “reducing person-to-person contact by 80% would curb the spread of infection,” earning him the nickname “Mr. 80%.” An article in which he reportedly expressed regret while looking back on that period in a recent interview became a hot topic on 5ch. In the thread, users traded sarcastic remarks about how packed commuter trains were the one “exception” quietly overlooked at the time, debated the merits of the state of emergency and mask measures, and argued over excess-death estimates — opinions were split on whether the measures taken back then ultimately turned out to be the right call.

“It’s crucial that we reduce person-to-person contact by 80%.”

On April 15, 2020, as the first wave of the novel coronavirus raged across Japan, Hiroshi Nishiura (48), a member of the Ministry of Health, Labour and Welfare’s expert panel and a professor at Hokkaido University (now at Kyoto University), stressed this point at a press conference held at the ministry.

Having repeated the “80% reduction” target at subsequent press conferences as well, Nishiura came to be known as “Mr. 80%.”

Source: news.yahoo.co.jp / Original article here

What people said

15AnonymousSep 21, 2026 23:02
So the people packed into commuter trains weren't human…?
24AnonymousSep 21, 2026 23:04
Re: #15
Because the Cabinet officially decided commuter trains don't spread infection. A Cabinet decision beats everything.
31AnonymousSep 21, 2026 23:06
Re: #15
Japanese-made trains are protected by some mysterious force, you see.
22AnonymousSep 21, 2026 23:04
The whole world basically ground to a halt during the pandemic. Still, no matter how many precautions you take, you catch it when you catch it. Living through that period made that pretty clear.
27AnonymousSep 21, 2026 23:05
Re: #22
Sure, you catch it when you catch it, but that doesn't mean “no precautions at all” was ever the right call.
33AnonymousSep 21, 2026 23:06
Re: #22
That's exactly the point being questioned now — whether grinding everything to a halt was even part of Fauci's strategy to begin with.
38AnonymousSep 21, 2026 23:08
Other countries went as far as lockdowns with actual legal penalties, you know. Pandemics can happen again, and if the next one's worse than COVID, we won't have time to sit around second-guessing ourselves like this.
46AnonymousSep 21, 2026 23:09
Re: #38
Over there, covering your face can get you treated like a criminal (anti-mask laws). Must be rough.
61AnonymousSep 21, 2026 23:12
Re: #38
There were no legal penalties, but Japan was pretty similar in practice. In my city, you couldn't even get into the Coming-of-Age Day ceremony venue without proof of vaccination.
56AnonymousSep 21, 2026 23:11
About 13 times as many people died as in the Great East Japan Earthquake… and people still call the response overblown. Unbelievable.
85AnonymousSep 21, 2026 23:17
Re: #56
It's not that many — more like 7.8 times, tops. And that's not hugely different from a bad flu season's death toll either. In other words, elderly people were going to die whether we took measures or not, and the population decline would've happened regardless. If anything, the only real fallout was on the birth rate, since couples held off having kids out of fear they wouldn't get proper hospital care while pregnant.
90AnonymousSep 21, 2026 23:18
Re: #85
Excess deaths topped 100,000 in 2022, but COVID deaths only accounted for around 30,000 of those. Which means…
156AnonymousSep 21, 2026 23:30
Re: #85
Based on public data from MHLW research groups, Japan's rough annual excess-death estimates are as follows: 2020 — no significant excess deaths observed (essentially zero or not statistically significant); 2021 — approx. 15,000–26,000; 2022 — approx. 117,000–144,000; 2023 — approx. 109,000–114,000.
Really shows how people forget the pain once it's over, huh.
65AnonymousSep 21, 2026 23:13
This was April 2020 — a point where nobody could accurately assess how dangerous the virus even was, right? Taking the safe route when it might've been an extremely dangerous virus seems totally normal to me. The Delta variant really was pretty dangerous later on, after all. Running the country on a “eh, it'll be fine!” attitude would've been the crazy move.
75AnonymousSep 21, 2026 23:15
Re: #65
The doctors actually treating patients were honestly saying it was only a bit worse than a cold.
88AnonymousSep 21, 2026 23:17
Re: #75
Hadn't Ken Shimura already died by then? As far as I remember, the reporting wasn't nearly that optimistic.
99AnonymousSep 21, 2026 23:20
Re: #75
In the early days it was more likely to turn severe.
103AnonymousSep 21, 2026 23:20
Re: #79
He was 72, I think. Seeing him hooked up to a ventilator, unconscious, at the end really made me think I don't want to go out that way.
111AnonymousSep 21, 2026 23:22
Re: #103
Well, 72 is an age where you could just as easily die from the flu or ordinary pneumonia, honestly.
118AnonymousSep 21, 2026 23:23
Re: #103
That's awful. Really rough.
116AnonymousSep 21, 2026 23:23
Back then was different from now — declaring a state of emergency at the time was the right call.
134AnonymousSep 21, 2026 23:25
Re: #116
It's just common sense as a national safety measure. You can say anything you want with hindsight, but as a response to an unknown virus, it was the right stance to take.
139AnonymousSep 21, 2026 23:27
Re: #134
Fauci knew all along it was just flu-level, lol
135AnonymousSep 21, 2026 23:26
Scarier than the virus itself was getting to see the ugly side of human nature.
143AnonymousSep 21, 2026 23:27
Re: #135
Peer pressure here works like village ostracism (mura hachibu). It's a uniquely Japanese thing, which is why we ended up with one of the highest vaccination rates in the world.
141AnonymousSep 21, 2026 23:27
Masks and avoiding the “Three Cs” meant flu basically didn't spread at all — didn't that prove it actually worked?
149AnonymousSep 21, 2026 23:28
Re: #141
It really was incredible how flu was completely wiped out back then. These days precautions are so lax it's spreading like crazy again.
154AnonymousSep 21, 2026 23:29
Re: #141
It was amazing how flu cases dropped to almost zero. That said, it was also shocking just how infectious COVID turned out to be, given it still spread even then.
211AnonymousSep 21, 2026 23:37
They filed anyone with an unknown vaccination date under “unvaccinated,” inflating the unvaccinated infection numbers lol


When tallying new COVID-19 cases, the Ministry of Health, Labour and Welfare had been counting people with “unknown vaccination history” as “unvaccinated.” It's now come to light that the reported number of new infections among the unvaccinated was inflated beyond the actual figure.
https://www.asahi.com/sp/articles/ASQ664JT1Q65UTFL005.html
Re: #1
229AnonymousSep 21, 2026 23:39
Re: #211
And even the third dose, which looks effective at first, ends up back on par with being unvaccinated after just two or three months.
272AnonymousSep 21, 2026 23:45
In the end, it was only old people who died anyway.
280AnonymousSep 21, 2026 23:46
Re: #272
Well, you can say anything with the benefit of hindsight.
284AnonymousSep 21, 2026 23:47
Re: #272
Early on, young nurses were dying too, you know.
319AnonymousSep 21, 2026 23:53
Re: #272
Kumiko Okae wasn't elderly.

Background and Points of Debate

Nishiura’s “80% reduction” figure came from a mathematical model calculation aimed at pushing the effective reproduction number below 1, based on the fatality rate and infectiousness of COVID-19 — which were still largely unknown at the time — and it became the basis for the request to refrain from going out under the state of emergency. At the same time, it was already being pointed out back then that situations like packed commuter trains, where reducing contact simply wasn’t practical, were effectively left out of the equation. The main point of disagreement in the thread was how to evaluate the excess deaths that piled up as a result. Because the yearly estimates vary in range and it’s difficult to separate out COVID deaths from other factors like the flu, some argued it’s premature to judge the merits of the measures based on a simple before-and-after comparison.

*This article is composed as excerpts and a summary of the 5ch (News Express+) thread “[Mr. 80%] Was It Right to Call for “80% Reduction in Person-to-Person Contact” Amid the COVID-19 Onslaught… Expert Who Led the Messaging on the Front Lines Now Expresses Regret.”

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