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--- The ocean and the sea
浜辺 hamabe beach 辺 [nearby area]  Ref. 浜 [beach]
umi sea | ocean   Ref. 海 [ocean]
海 へ 行く umi e iku to go to the seaside   Ref. 海 [ocean]
海洋 kaiyō sea | ocean   Ref. 洋 [ocean]
海岸 kaigan coast | seashore   Ref. 岸 [shore]
nami wave   Ref. 波 [wave]