TOKIO to cancel their new single

I just read the annoucement from JE's TOKIO that they have decided to cancel the release of their new single KIBOU.
The released was set to Feb 1 and the song is currently used in a CM for Yamato Transport co.

It's not stated why the reason is but.. it makes me wonder..
They also send they appology to the stores and fans who already pre-ordered it.

I don't think I have even heard a JE cancel before...
Another date is not set, we just have to wait and see, the full news might turn up? ^^;;

*Edit: The single will be released on Feb 29 together with "Haneda Kuukou no Kiseki"§