REAGAN READY TO IMPOSE TRADE CURBS AGAINST JAPAN President Reagan was ready to impose retaliatory trade action against Japan for breaking its semiconductor agreement with the United States, White House officials said. There was no immediate indication when Reagan might act on the recommendations of his Economic Policy Council to curb Japanese exports to the United States, but officials said the move could come today or early next week. Trade sources said the actions being weighed by Reagan include tariffs on a wide variety of Japanese exports which use semiconductors. The sources said the tariffs could be slapped on personal computers, television receivers and laser-printers, with the aim of penalizing Japan's major electronic firms, including NEC Corp, Hitachi Ltd, Toshiba Corp and Fujitsu Ltd. They said Reaan could also delay invoking sanctions for a week or two, giving Japan a final opportunity to end the dumping practice, but added that negotiators had already held extensive talks with the Japanese to no avail.