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The story
In Shisui, Chiba Prefecture, an embankment collapsed under the impact of Typhoon No. 25, flooding residential areas around Lake Inbanuma. The breach occurred on September 22, and drainage pumps have since been added on site as reports track how the flooding situation is changing. On 5ch, thread posts piled up showing algae-choked, foul-smelling scenes and photos of insect damage. Discussion centered on practical questions: compensation for residents, how far insurance would actually cover the damage, the possibility of a future class-action lawsuit, and whether it even makes sense to rebuild homes on land that keeps flooding.
What people said
Lake Inbanuma breach
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https://www.youtube.com/watch?v=q3TCNii3RU8
Yeah, without that it'll probably just happen again
So that's what "Kaiun" (good fortune) really means, huh
the name is killing me
Probably named it something lucky and happy-sounding because something terrible happened there in the past
Oh it's bad
Reeking something awful
Would they really rebuild? This is land that turns into a swamp
Is there any compensation for this?
If you're renting it's no big deal, but if you bought the place it's basically your own bad luck….
Someone running a shop said they asked their insurer about compensation for water damage above floor level, and were told the area you walk into with shoes on doesn't count as "above floor level," so they got zero payout. Saw it on social media — no idea if it's actually true
Compensation for what?
Why would the local government compensate anyone for flood damage?
If you own the home, it's basically your own responsibility
And insurance wouldn't cover it anyway
This is genuinely bad
On the bright side, this might spur development of a pesticide to deal with these things
Lawsuits over flooding caused by dam releases happen a lot, but they usually lose
This one would probably lose too if it went to court
Might've gone differently if they'd used the water to attract semiconductor companies, like Kumamoto did
Maybe they should use all that water to attract data centers
Chiba's not great to live in, but it's close to Tokyo so the location isn't actually bad
Flood damage isn't compensated and insurance doesn't cover it either
You bought it, so it's on you to deal with it
That's just what buying something means
It's not exactly excluded — there's a wind-and-flood-damage rider that covers that
Hmm… yeah, this one's on them
Flood riders are probably going to disappear for Chiba at this rate
given how bad this is
Payouts went through fine after the Osaka typhoon too, so this'll probably be the same
Though premiums going forward are a different story
There used to be a drainage channel running underground through the embankment that fed into the river to the north, but that section collapsed, so they basically have to dig it all back out and rebuild it
Background and Key Points of This Story
The embankment collapse reflects a structural weakness that has been flagged at reclaimed/built-up land sites across the country in recent years. According to the thread, a drainage channel originally ran underground beneath the collapsed section, designed to carry water to the river to the north — but the collapse knocked out that function entirely, meaning the system now has to be dug up and rebuilt from scratch. Where opinions in the thread split was over who should bear responsibility for the damage: some argued that homeowners are, as a rule, responsible for their own property, while others countered that wind-and-flood-damage riders ought to cover it. Under standard fire insurance practice, payout amounts hinge on whether flooding reached above or below floor level, and one post claimed a shop’s dirt-floor entryway wasn’t recognized as “above floor level,” zeroing out the payout. That claim, however, is unverified information from social media, and whether coverage applies depends on the specific policy and the insurer’s judgment.
*This article is compiled from excerpts and a summary of the 5ch (Nandemo Jikkyou G) thread “[Chiba] That Spot That Turned Into a Swamp After the Lake Inbanuma Breach — A Dramatic Before & After With Added Drainage Pumps!“
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