磯祭 いそまつり Also written 磯祭り, 磯まつり Meanings Noun (rocky) seashore party; seashore festival See also: 磯遊び (いそあそび). celebration in honor of the dragon god by fishermen after a good haul Kanji 磯 seashore; beach. Read as いそ. 祭 festival. Read as まつり. Jinuma: Japanese Dictionary · Word lists