Amazon.com's (AMZN) - Get Report Japan unit is getting rid of a contract clause that requires e-book and other suppliers to guarantee prices lower than what is offered by rival e-commerce websites, Nikkei Asian Review reports.

The decision is a response to an antitrust investigation that was started last year by the Japan Fair Trade Commission.

The probe was launched due to the suspicion that the unfair contract terms were gradually wiping out competition.

Shares of Amazon.com were up by 0.27% to $998.46 on Tuesday afternoon, earlier in the day the stock topped $1,000.

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