似にたもの同どう士し

expression, noun

two of a kind; birds of a feather; two people alike

Used when two people are very similar in personality, tastes, or behavior, often with a slightly negative or ironic nuance. The phrase is a set expression.

• あの二人ふたりは似にたもの同どう士しで、すぐに仲なか良よくなった。

  Those two are birds of a feather and quickly became friends.

• 彼かれらは似にたもの同どう士しだから、よく喧けん嘩かもする。

  Since they are so alike, they often argue as well.