Reply #24: Cheaper than earlier estimates

[Someguyinjapan]

25 trillion yen is roughly 250 billion dollars, which is lower than the 300 billion dollar edtimate I've seen.

As for "cleverly missing your statement", I didn't even bother with it because it is a complete non-starter-"If automated technology could..." which means no one has any idea if that is true or not.

PS: The Japanese live on 25% of the land as a result of massive post-war urbanization in t
he shift from a largely agrarian economy to an industrial one, similar to what happened in the U.S after the late 19th century, not because they are afraid of volcanos.

PPS: Ever heard of Kagoshima? City of 600,000 people with an active volcano that has erupted a cople of times last century within the city limits? So yeah, I guess the Japanese do build cities where they shouldn't, because as you so aptly point out there ate a lot of volcanos here and not alot of land to choose from. So you might as well start building floating islands. It is the logical progression to your wacky line of yhought.