This excerpt taken from the IX 6-K filed Jun 26, 2006.
2. Reason for Withdrawal
It has been decided that the shelf registration (Shelf Registration No. 17-Kanto 85) that was submitted on July 4, 2005 and that is effective until July 11, 2006 will be withdrawn, as there are no plans to issue stock acquisition rights for the remaining balance of 5,166,830,000 yen.