One example of a problem that may occur after purchasing real estate, as opposed to what was explained at the time of the contract, is when you are explained that "the property has very good earthquake resistance/vibration control/isolation performance and is strong against earthquakes.”
In reality, it is difficult to judge whether a property is strong against earthquakes only by its seismic/damping/isolation performance, since other factors such as location including the ground are involved. In the event of a major earthquake, the streetscape may be completely changed.