That's amazing that they had the technology back then to protect those structures from earthquakes. Do you know which castle sushiman was near when the earthquake hit? The only earthquake I recall ever actually feeling happened several years ago here in central NY State. I was sitting on the sofa, and felt it, but then thought I had imagined it, and noticed the lamp shade was swaying, so that convinced me it had been a small quake.
Earthquakes . We had 2 : a 6.2 and a 7 both within 28 hours . Wiki : https://en.wikipedia.org/wiki/2016_Kumamoto_earthquakes
We’d moved into our new home exactly two weeks before ! Yes , there was some damage but nothing major . Everything that wasn’t nailed down went onto the floors inc. tv , computers , rice cooker , glassware , stereo speakers ( one fell from the loft on the second floor to the first ) , my record collection , etc ,. Wife had PTSD for a couple of years.