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The story
On the evening of September 8, 2026, smartphones across Nagoya City wouldn’t stop blaring heavy rain and evacuation alerts. Water levels rose on multiple rivers, including the Shonai and Ueda rivers, forcing the closure of part of the Tsurumai subway line and the underground parking lot at Ozone on National Route 19 as a flood-prevention measure. A live-discussion thread on 5channel filled up with photos and videos of rivers and roads, along with a steady stream of reports from people struggling to get home or evacuate. The situation sparked wide discussion, with some pointing out that rainfall had exceeded expectations and others drawing comparisons to the catastrophic 2000 Tokai flood.
What people said
Western Minato Ward seems okay for now
But the east side is bad news
https://video.twimg.com/amplify_video/2097232334961741824/vid/avc1/720×1280/l1mHkVoz7ciYVkvh.mp4
https://pbs.twimg.com/amplify_video_thumb/2097232334961741824/img/htbi3npKQxqmkb-q.jpg
There's a pineapple floating in there
Weird sight — cars are just driving normally in the background
Oh no, this is bad
The Shonai River has turned black
Is the Shin River gonna get wrecked again?
Might want to stop using black for that, honestly
(In disaster triage, a black tag means the person isn't breathing — beyond saving)
Good news, Iwakura City's only at Level 4 🤗
The news said it's even worse than that
Seriously?
That area's put serious effort into flood control, but this might be too much
If that's true, Nagoya Dome and the cars parked at Iwase are gonna go underwater again
tps://video.twimg.com/amplify_video/2097243451855388673/vid/avc1/720×1280/8najCVCQ2sJE9yqw.mp4
The river's got waves like the ocean
The Tsurumai Line was shut down. Not sure if it's a full suspension, but fire trucks showed up too
There's barely any water there after all
This is what happens when you don't build one
https://www.konan-kankou.jp/?page_id=4099
Not Nagoya City, but…
Actually Konan City, home to this one, is only at Level 3 lol
Takaoka City in Toyama, home of the Takaoka Great Buddha, just got hit by a heavy rain disaster recently though
There's one in neighboring Tokai City though 🥺
Seriously… just go kill time somewhere instead
Make it back alive
Don't blame us if you fall into an open manhole on the way
Ministry of Land, Infrastructure, Transport and Tourism, Nagoya National Highway Office @mlit_meikoku
[Underground Parking Lot Closure] The entrances/exits of the National Route 19 Ozone underground parking lot have been closed to prevent flooding.
Infrastructure's falling apart
It's the sheer intensity of the rain in short bursts
Japan's flood-control measures are basically designed for around 50mm of rain per hour
Chiba and Nagoya are seeing 70-80mm, and in some spots 100mm — no wonder it can't keep up
It's the highest rainfall on record
Maybe twenty years ago
Cut it out with disaster-related misinformation
Neither the Dragons nor Grampus even rate a weather advisory these days (Grampus = Nagoya's J-League soccer club; joking that both local teams are weak)
If it's some clueless ordering system, they'll probably just take it anyway
Depends on where you are, really
Background and Key Points of the Discussion
Much of Japan’s flood-control infrastructure was built to handle around 50mm of rainfall per hour, so a localized downpour reaching 70-100mm, as seen here, easily exceeds that capacity. The thread gathered concrete details on the flooding of the Shonai and Ueda rivers and the closures of underground parking lots and subway lines, but opinions split between those who blamed “deteriorating flood-control technology” and those who argued the rainfall simply hit a record high. Comparisons to the 2000 Tokai flood also came up, but whether the actual rainfall this time exceeded that event remains hearsay within the posts — confirmation from an official source like the Japan Meteorological Agency isn’t available from the thread itself.
※This article is compiled and summarized from the 5channel (Nandemo Jikkyou G) thread “[Sad News] Nagoya Resident Guy’s Phone Alarm Won’t Stop Blaring.”
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