I'm going to Japan again for the third time and for this trip, I'm going to attend my first Japanese concert. I've been to many Japanese concerts here in Canada but I haven't been to a concert in Tokyo before.
Anyone have any tips for concerts. I already have 2 tickets for a concert in August. So does anyone have any tips on what to do or what should I expect from a Tokyo concert.

Example like do I have to line up early or do I have to bring ID or is there an age limit for the concert and so on...

Never heard of an age limit for a concert

But I would go early and expect to queue (patiently )