Japan's antitrust watchdog conducted an on-site investigation of the Japanese unit of Amazon.com Inc. on Tuesday for allegedly forcing retailers to cut prices of products sold on its online shopping website, sources close to the matter said.Amazon Japan G.K. is alleged to have violated the antimonopoly law by forcing retailers to reduce prices in return for displaying their products in the most visible positions for users of its platform, with the involvement of its U.S. headquarters also suspected.The move comes as U.S. and European antitrust authorities are reported to have ramped up thei…READ FULL ARTICLE