筋すじを通とおす

expression, godan verb (-su)

do things properly; follow the correct procedure; act logically

Used when someone insists on doing something in a principled, orderly, or officially correct way, often with a nuance of moral integrity or adherence to rules.

• 彼かれはいつも筋すじを通とおしてから行こう動どうする。

  He always acts only after making sure things are done properly.

• まずは上じょう司しに話はなして、筋すじを通とおしたほうがいい。

  You should talk to your boss first and go through the proper channels.