桑そう田でん碧へき海かい

expression

the world is constantly changing

A literary yojijukugo from a Chinese legend, expressing that the world undergoes profound transformations over time, like a mulberry field turning into a blue sea. Rare in modern conversation; used in classical or poetic contexts.

• 「桑そう田でん碧へき海かい」という言こと葉ばは、世よの中なかの大おおきな変へん化かを表あらわす故こ事じ成せい語ごだ。

  The phrase '桑田碧海' is a classical idiom that expresses great changes in the world.