Junior Simões
I would like to see some pop, indie, rock or electro music show or maybe some festival in Tokyo. There are some places that I can find it?! Recently I discover the band TOE from Japan and love it, but unfortunately they don't play during the time I gonna be there! :-(
Akane
You can take a look at this website. They gave a calendar of upcoming events and they'll help you book tickets (for a fee) if you need some assistance doing so.
http://www.japanconcerttickets.com/events/
If you don't want to buy through them, you can also go to a Ticket Pia booth in Tower Records Shibuya after arriving in Japan. https://en.japantravel.com/tokyo/tower-records-shibuya/4542