Are all Ayu's albums available in Japan?

[Chiharo]

Well,my friend is going to Japan next 2 months and she said that she could buy every album I wanted from Ayu.
So I decided on all of them (yay,lucky me!) besides of GUILTY (because I already have it).

So the problem is that I don't know if CD shops in Japan still have her all albums (I mean from A Song for XX to Secret)...

So would there be any more copies available for me?