滄海[soukai] blue waters 滄海一滴[soukaiitteki] a drop in the ocean (bucket) 滄海桑田[soukaisouden] The word is a scene of constant changes (as the blue sea changing into a mulberry field). (Chinese legend)
桑田滄海[soudensoukai] The word is a scene of constant changes (as a mulberry field changing into a blue sea). (Chinese legend) 滄溟[soumei] great blue sea 滄浪[sourou] blue waves