The yen inched up to the lower 160 range against the U.S. dollar Thursday in Tokyo after tumbling to a 37-year low overnight, as repeated warnings by Japanese authorities heightened fears over another market intervention. The Japanese currency hit 160.88 versus the dollar in New York, its lowest level since December 1986, after dropping past 160.24 logged on April 29, a level that likely prompted Japan to conduct a yen-buying operation to arrest its decline. At 3 p.m., the dollar fetched 160.40-43 yen compared with 160.78-88 yen in New York and 159.89-91 yen in Tokyo at 5 p.m. Wednesday. The e…