JAPAN WARNS OF ANTI-U.S. SENTIMENT IN TRADE ROW Japan is sending a three-man team to Washington to try to halt threatened trade sanctions that officials warn could spark a wave of anti-U.S. Sentiment here. The team will lay the groundwork for high-level emergency talks next week aimed at defusing an increasingly bitter row over trade in computer microchips, officials said. "The sanctions are against the free trade system," Ministry of International Trade and Industry (MITI) director general Noboru Hatakeyama told reporters, adding: "If these measures are taken, the atmosphere in Japan against the United States would become not so good as before." Other officials were more blunt. "The U.S. Action will have a significant impact on the growing anti-U.S. Feeling (here)," another MITI official said. A senior Foreign Ministry official, who declined to be identified, told Reuters the U.S. Threats have undercut those in the government who argue for conciliation. "There is a very strong argument in Japan that since the United States is imposing tariffs unilaterally, why should we bother doing anything," he said. "Anything we do, we will be bashed." The senior official sounded pessimistic about the likelihood of Prime Minister Yasuhiro Nakasone defusing U.S. Anger over Japanese trade practices when he visits Washington on April 29. "I don't think trade friction will be solved all of a sudden (by the visit)," he said. Nakasone is widely expected to present a package of measures to President Reagan to help contain U.S. Frustration over Japan's large trade surplus. But the senior official played down those expectations.