下調べ

Meanings

1. Noun, Suru verb, Transitive

   preliminary investigation; preliminary inquiry
2. preparation (for a class); going over one's lessons (in advance); studying ahead

• 下調したしらべはしたかい。会議かいぎは２日ふつか後ごだよ。

  Did you do your homework? The meeting is only two days away.