The ruling Liberal Democratic Party questioned a Google LLC executive Wednesday over the company's data protection and transaction practices as part of efforts to tighten regulation on information technology giants.

The party headed by Prime Minister Shinzo Abe is also set to hear from Facebook Inc. on Friday as the nation's antitrust watchdog and government ministries examine whether the market position of dominant tech companies, also including Apple Inc. and Amazon.com Inc., is hindering fair competition.

"We need to compile transparent and fair rules to remove the negative impact while promoting technological innovation at the same time," said LDP policy chief Fumio Kishida during the portion of the meeting that was open to the media.