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CORRECTED-Blackstone to launch tender offer for Japan's Unizo

(Corrects day of week in first sentence, fixes typo in headline)

TOKYO, Oct 15 (Reuters) - Private equity firm Blackstone Group said on Tuesday it would launch a tender offer for Japan's Unizo Holding at 5,000 yen ($46) a share, firing back after its earlier bid for the hotel chain was rebuffed.

Blackstone said in a statement it would consider various options, including launching the tender, if Unizo didn't agree by Oct. 23.

($1 = 108.3600 yen) (Reporting by Junko Fujita; Writing by David Dolan; Editing by Louise Heavens)