TOKYO, Jan 6 (Reuters) - U.S. private equity fund KKR

said on Monday it sent a letter to Fuji Soft

asking it to make a court filing to stop what it said was Bain

Capital's violation of a non-disclosure agreement amid Bain and

KKR's acquisition battle for the software maker.

In the letter, KKR asked Fuji Soft to file an injunction to

halt Bain Capital's "continued breach of its non-disclosure

agreement".

KKR and Bain are trying to buy Fuji Soft in competing tender

offer bids worth as much as $2 billion.

Fuji Soft's board has come out in support of KKR's lower bid

and demanded that Bain destroy the confidential information it

compiled during due diligence.

Bain has said this disregarded the interests of shareholders

and that it wanted to continue using the information to launch

its tender offer. Fuji Soft's founding family has said it

supports Bain's bid.

Fuji Soft and Bain did not immediately reply to Reuters'

requests for a comment.