Japan eyes steps to limit ash fall damage in event Mount Fuji erupts

It's rather critical to bear in mind that volcanic ash isn't like ash from a cigarette or campfire. Volcanic ash is more like concrete powder with sharp edges.

So, even a few centimeters of volcanic ash is very heavy and damaging, even more so when it becomes wet.

Japan eyes steps to limit ash fall damage in event Mount Fuji erupts

Steps? Do they even prepare for that, in the even that really took place, what will happen just another chaos like what happens in Fukushima and Noto earthquake.

I suppose our Lilliputian lords and masters feel obliged to be seen to be doing something; but second guessing Mount Fuji seems like a fools' errand to me.

In Nagano, there was ash fall-out from Mount Asama.

In 2020, the government released its first damage estimates for the Tokyo metropolitan area in the event of an eruption...

Mount Fuji last erupted in 1707

a speedy recognition by the government that it might be a good idea to begin starting to maybe begin to consider thinking about it.

except for four-wheel drive vehicles, 

Understood the directive here.

Wandora

wallace

In Nagano, there was ash fall-out from Mount Asama.

Did society crumble?

It does until the ash is removed. The flying rocks can kill people and damage property. Very difficult situation.

"Mount Asama erupted in early February 2009, sending ash to a height of 2 km (6,600 ft),[18] and throwing rocks up to 1 km (0.62 mi) from the crater. Ash fall was reported in Tokyo, 145 km (90 mi) southeast of the volcano crater. On 16 February there were 13 recorded volcanic earthquakes and an eruption emitting smoke and ash in a cloud 400 m (1,300 ft) high."

It does until the ash is removed. The flying rocks can kill people and damage property. Very difficult situation.

how many people and how much property was hit by flying rocks?

Good initiative. How about all those hotels, resorts and houses that were build very near mount Fuji?

A volcanic eruption of Mount Ontake (御嶽山, Ontake-san) took place on September 27, 2014, killing 63 people.

A volcanic eruption of Mount Ontake (御嶽山, Ontake-san) took place on September 27, 2014, killing 63 people

That's not Mount Asama.

60 people were killed in a landslide in Nepal a few weeks ago!!!!

A Mount Fuji eruption could cause a powerful earthquake.

Always banging in about huis what if scenario trying to make decent people scared. If it’s not ruddy global warming it’s volcanoes, lol. Strewth, just get on with lie and enjoy yourself lie what I don’t have time for this constant fear mongering malarkey you see.

I find that trying to compare one situation with another some what bizzar, how can you calculate the amount of ash fall out with a different scenario, it's more of a wild guess, the eruption could be smaller than predicted or it could be so much bigger, the wind could be a huge factor, it could blow ash away from Tokyo, or completely in that direction, is there any plans where to dump the ash? What machines will be utilised? Is there any agreement with out side contractors in place to help? I think that they are still poorly organised and have a wishy washy plan,

 find that trying to compare one situation with another some what bizzar, how can you calculate the amount of ash fall out with a different scenario, it's more of a wild guess, the eruption could be smaller than predicted or it could be so much bigger, the wind could be a huge factor, it could blow ash away from Tokyo, or completely in that direction, is there any plans where to dump the ash? What machines will be utilised? Is there any agreement with out side contractors in place to help? I think that they are still poorly organised and have a wishy washy plan,

There is a rich repository of data from volcanic eruptions all around the world which can be used to make predictive models of an eruption of Mt. Fuji. Volcanos erupt every year so there is no shortage of data. Historical weather and winds are recorded going back many decades. There is not as much guesswork as you imagine. A good mathematical modeler can build a model of a Mt Fuji eruption that can predict a range of possible outcomes based on real world data. That range of outcomes can inform disaster planning. I do similar sorts of work in the pricing/economic realm. It is doable. A good modeler will state the range of possible outcomes within a certain confidence level. It won't be a point estimate if it's good. A point estimate is almost always wrong, but you can accurately say that within a 50% confidence interval these outcomes are possible, and if you expand to an 80% confidence level more outcomes are possible. That covers the range between a minor and really big eruption. This is the sort of thing I do for a living, not with volcanos but the same math and methodology applies.

Reading the comments here you do not give your nation the credit due. Japan is one of the most prepared nations on the planet. You deal with earthquakes better than any other nation in the world, rivaled only maybe by the state of California which is likewise very well prepared. That 9.0 quake and tidal waves were exceptional. I don't think any nation could be prepared for that. That same quake and similar tidal waves are possible off Washington and Oregon and they have made no preparations at all for it. Japan handles lesser quakes with aplomb, quakes that would devastate most of the rest of the world. A 5.9 quake in Japan does little or no damage. In Italy it collapses houses and churches and kills people. In Iran you get tens of thousands dead. In Japan nobody dies in a 5.9 quake and buildings don't fall. You are better prepared than you give yourself credit for.