Usd/jpy - 91.28 ... Japan said that it wud be difficult to resume six-party talks on Pyongyang's nuclear programmes after South Korea said that evidence was overwhelming that a North Korean submarine has fired the torpedo that sank one of its navy ships in March. Despite brief bounce to 91.88 in Asia, the greenback weakened again on active cross buying in jpy (eur/jpy, aud/jpy n gbp/jpy fell sharply fm 114.11 to 112.29, fm 132.73 to 130.72 n fm 78.01 to 75.44 respectively). Offers are tipped at 91.50/60 n 91.80/85 whilst bids are located at 91.00/05 with stops building up below 91.00 n 90.80.