The U.S. dollar fell slightly to the lower 159 yen zone Tuesday morning in Tokyo amid persistent concerns over a possible yen-buying intervention by Japanese authorities aimed at arresting the yen’s recent decline. At noon, the dollar fetched 159.32-33 yen compared with 159.52-62 yen in New York and 159.68-70 yen in Tokyo at 5 p.m. Monday. The yen remained weak against the euro, having neared a record low overnight in New York. The euro was quoted at $1.0735-0739 and 171.03-10 yen against $1.0729-0739 and 171.28-38 yen in New York and $1.0712-0714 and 171.06-10 yen in Tokyo late Monday afterno…