pebbly beach; rocky beach
Refers to a beach covered with pebbles or rocks rather than sand. Often used in place names and literary descriptions.
磯浜で波の音を聞きながら散歩した。
I took a walk on the pebbly beach while listening to the sound of the waves.
このあたりの磯浜は、
On the rocky beaches around here, there are many small creatures in the tide pools.
Compound of 磯 (いそ, 'rocky shore') and 浜 (はま, 'beach'). The exact historical derivation is uncertain, but the spelling is conventionally associated with a pebbly or rocky beach.