* Founding Idemitsu family still opposes merger
* Purchase of stake from RDS delayed, awaiting FTC ruling
(Adds background on merger plans)
TOKYO Dec 19 Japan's Fair Trade Commission said
it would hold a news conference at 4 p.m. (0700 GMT) on Monday
regarding its decision on whether to approve Idemitsu Kosan Co's
planned takeover of rival refiner Showa Shell.
The deal has seen several setbacks with the Idemitsu
founding family threatening to veto it once it is put up for
In the face of that opposition, Idemitsu management in
October postponed a full takeover of Showa Shell indefinitely,
aiming to bring the founding family on side.
But Idemitsu management has said it would go ahead with an
agreed acquisition of a one-third stake in Showa Shell from
Royal Dutch Shell once anti-trust authorities grant
approval for the two companies to combine.
The acquisition of the stake had been scheduled to be
completed by the end of September but has been delayed several
times as the firms waited for an FTC ruling.
(Reporting by Taiga Uranaka; Editing by Chang-Ran Kim and