Inc.'s Japan unit has pledged to return around ¥2 billion ($18.8 million) to around 1,400 suppliers after having them shoulder part of the costs to cover discounts the online retailer applied on goods, the antitrust watchdog said Thursday.

The pledge was part of Amazon Japan G.K.'s proposed reforms submitted to the Japan Fair Trade Commission in late August. The commission, which investigated the online retailer in 2018 on suspicion of violating the antitrust law, accepted them on Thursday.

With the reform plan approved by the commission, Amazon Japan is exempted from penalties and there will be no decision on whether it has violated the antitrust law.