TOKYO : Top Japanese finance officials said on Friday the government is "alarmed" by recent foreign exchange moves and is ready to intervene if speculative moves were deemed excessive, as the yen resumed its rapid downturn. Against the Japanese yen, the dollar rose to a top of 157.93 on Friday, its highest since July, after the Bank of Japan kept interest rates unchanged on Thursday and its governor offered few clues on how soon it could push up borrowing costs. "We have been recently seeing