桑田滄海
そうでんそうかい
the world is a scene of constant changes (as a mulberry field changing into a blue sea)
桑田変じて滄海となる is read as そうでんへんじてそうかいとなる (soudenhenjitesoukaitonaru) and means the world is a scene of constant changes.
そうでんへんじてそうかいとなる
soudenhenjitesoukaitonaru