The first night is sold out, but you can still buy tickets for the second night in Tokyo.
Have you really checked all the webistes? Try e-plus or ticket-pia.

If you are looking for good seats, getting them on yahoo auctions might be a better idea. Just wait for a while. All the FC and presale tickets are going to be sent out around the end of this month. You'll see more tickets on yahoo auctions and have a better chance of getting good seats. Do you need any help with creating an account on yahoo auctions?