>>40675697
>The impact of the wave pushed land up, making it look as if Hong Kong, Taiwan, and the Philippines were all connected.
It may be just a weird translation of Japanese.
Here's my take: before a tsunami hits, water retreats. Just like waves at the beach. See gif related.
Maybe the water for such a huge wave will retreat in such a way that all ocean floor connecting these places will be exposed, making it look as if it was all the same land for a moment.
Just my own theory, though.