Fuji Television Network Inc. -- the nation's largest private broadcaster -- is putting up a fierce defense against a takeover attempt by Internet firm Livedoor Co.

Softbank Corp. affiliate Softbank Investment Corp. has entered the fray, becoming Fuji TV's biggest shareholder by borrowing 353,704 Fuji TV shares from Nippon Broadcasting System Inc., a small radio company in the Fuji TV-dominated Fujisankei Communications Group.

Livedoor is reportedly considering a court challenge to the share loan.