U.S. WEIGHS LIFTING JAPANESE TRADE CURBS The White House has completed a new review of Japanese semiconductor trading practices but has not yet decided whether trade sanctions levied against Japan last April should be lifted, U.S. officials said. They said the president's Economic Policy Council looked at Japan's adherence to the 1986 U.S.-Japanese semiconductor pact yesterday and that an announcement may be made shortly. But there was no hint what the announcement might be. Officials have said the 100 pct tariffs on 300 mln dlrs of Japanese exports could be modified if Japan was found to be honoring a portion of its semiconductor pact. But they also noted that the White House has said it was unlikely the tariffs would be lifted before the meeting of the world's seven major economic powers in Venice on June 8-10. The officials added that while the curbs complicated U.S.-Japanese economic cooperation, they did serve to blunt Congressional criticism that the Reagan Administrtation was not taking tough actions to reduce he U.S. trade deficit. Reagan imposed the sanctions on April 17 in retaliation for Japan's failure to honor commitments to end dumping semiconductors in world markets at less than production costs and to open its own market to U.S. goods. The sanctions were levied on certain Japanese television sets, personal computers and hand-held power tools. Reagan, in imposing the curbs, said they would be lifted as soon as there was evidence of a pattern that Japan was adhering to the pact.