TOKYO (AP) — Asian shares mostly declined Monday, as Japan’s benchmark took a tumble after the yen surged against the U.S. dollar. Japan’s benchmark Nikkei 225 dropped 1.9% to 52,812.45 on selling of big exporters like Toyota Motor Corp., whose shares fell 3.2%. A weak currency is generally favorable for Japanese exporters because it helps elevate the value of their overseas earnings. In recent months, the dollar has gained against the yen. It fell sharply in the past few days after officials