Queries on Ayu's concert
 

Hi! I live outside of Japan but I want to prolly watch soon one of Ayu's concerts like her countdowns in Japan so I just wanna ask a few questions before I could make it possible :)

1.) What's is the best/fastest way (that won't also cost too much like ad-ons) to buy her tickets? Online? through middle-man? etc?

2.) How much does her tickets usually cost? and how much would the best seats be like the nearest ones where you can actually see her in person and not just on the big screens?

3.) Are there prohibitions/restrictions during her concert? e.g bringing of DSLRs?

4.) Do her tickets still sell so fast that I have to be on alert just so I won't get sold out?

Thank you sooo much :)
and a little advice on what to do before and after her concert would also be appreciated since it will also be my first time to go to Japan :)