Japan\'s finance minister warned he\'s ready to intervene in the currency market again to stem a yen advance that risks slowing the nation\'s recovery. \"An unstable situation is continuing,\" Yoshihiko Noda, 54, said during a talk show yesterday on public television broadcaster NHK. \"As foreign exchange market matters are my prerogative, I will continue to closely watch the markets and take bold action if it becomes necessary.\" The yen has risen above the level that prompted Japan to sell the currency on August 4 for the first time since March.