How do I book the beach festival tickets

Hi, i found out there was a music festival with some bands im interested in. However, I don't understand how to buy the tickets from the website.

They gave these sites:

http://l-tike.com/

(I can't navigate this at all)

http://pia.jp/t/japanjam/

(I got up to the point I need to make an account, but I dont know if I can create an account out of japan as the address option only had it within japan (I think?) And i was worried if it would mail the ticket to that address)

http://eplus.jp/jjb2015/

(same issue with the second link)

is there anyway to get the ticket on my phone/ email facebook (does it say so on the website)? any idea of regular ticketing procedures?

Also, is there anything I need to be wary of? Is it safe? Should I pack food? etc

Thank you!

Hello.
You can book the ticket on that website.
But the ticket need to be issued at Lawson(Japanese convenience store)　or to be received at the address within Japan.
Sorry that I can't give you any good idea.

Issued as in I go to lawsons and they print out for me right? I'm okay with that, okay ill ask my teacher to help me navigate the site :x