Severo-Kurilsk, an island town destroyed by a similar tsunami in 1956, lost its port again: https://en.wikipedia.org/wiki/Severo-Kurilsk — the rest of the settlement was rebuilt on higher ground, leaving only the port vulnerable.

The settlement is notable as having belonged to the Japanese in late 19th and early 20th centuries, who once relocated islanders there. Russian Wikipedia says they were Ainu.