列島また大震災発生すれば?
<iframe width="592" height="1053" src="https://www.youtube.com/embed/UKFjxbDvf5w" title="In 1998, Papua New Guinea was hit by a tsunami wave. #tsunami #waves #earthquake" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>