noun
east coast; east bank
Refers to the eastern shore of a sea, lake, or large river. Can be used for both natural coasts and riverbanks.
その島の東岸には美しい砂浜がある。
There is a beautiful sandy beach on the east coast of that island.
川の東岸に沿って桜並木が続いている。
A row of cherry trees runs along the east bank of the river.