海うみ千せん山やま千せん

noun which may take the genitive case particle 'no', noun

cunning and worldly-wise; sly old fox

Describes a person who has been through many experiences and become shrewd, crafty, or hard to deceive. Often used with a slightly negative or wary tone.

• 彼かれは海うみ千せん山やま千せんの政せい治じ家かだ。

  He is a crafty, experienced politician.

• 海うみ千せん山やま千せんの相あい手てだから、気きをつけて交こう渉しょうしないと騙だまされるよ。

  He's a sly old fox, so be careful when negotiating or you'll be tricked.