Conversation so far:
what body of water borders japans west coast
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula and Russia.
does the sea of japan have tides
The Sea of Japan has almost no tides due to its nearly complete enclosure from the Pacific Ocean.

Question: can you give me another consequence of the enclosure
Self-contained rewrite: can you give me another consequence of the enclosure of the sea of japan