Tour Dates and Tickets?

[amorphose]

I know there are already a couple threads about how to acquire tickets for an Ayu concert, but I can't find the specific information I'm looking for in these threads...

I live in the United States, and I am planning a trip to Japan next summer. I was hoping to go in July (but the main point of the trip is to see Ayu) so I was wondering... when do her tours usually end? Do they usually extend into July, because for some reason I was thinking they usually ended in June.

I'd like to go to a show in Tokyo, or close by, so my second question is-- where do the Tokyo dates usually fall? Near the beginning, or end of the tour?

Third-- is there any way to get tickets before going to Japan? I know one could get them on Yahoo! Auctions, or EBay or something, but is there anyway 100% legitimate way to get them? Is there a website like TicketMaster that will do it for you? I'd like to get really good seats, and early too, if possible.

Thanks for reading~