Help me buy Ayu concert tickets?

[SheFliesHigher]

I am currently studying abroad in Japan. According to Ayu's tour schedule, she will appear in Osaka in April. I live very close to Osaka and so naturally I want to go to that concert. I know some people on this board have been to concerts. Can anyone give me advice on getting tickets? I asked a Japanese friend, and she said she would help, but then she sent me a vague email saying she was not going to be able to get tickets because Ayu is too popular. I asked another Japanese person I know today and he knows nothing about concerts...I think I will have to get tickets off of Yahoo Japan auctions. I did see a pair up today for the show in Tokyo.

So basically:

(1) Would tickets for the Osaka show in April available for purchase yet?
(2) Any option besides Yahoo auctions?
(3) Any other tips?

Your help is greatly appreciated.