digression; aside; tangent
Used for a remark or story that goes off the main topic, often in conversation or writing. Common in phrases like 余談ですが (as an aside) or 余談はさておき (digressions aside).
As an aside, I hear he's getting married next month.
Digressions aside, let's get to the main topic.
As an aside, this shop has actually been running for over 50 years.
The teacher often throws in digressions during class.
Digressions aside, let's get back to the main topic.