USD/JPY - 90.31.. Dlr has maintained a firm bias in Asia as regional bourses are all up today with N225 up 2.7%, Australian All Ord. up 2% & HSI up 1.8%. Strg performance in equities has attracted active yen carry trades activities in Asia but reported offers at 90.50-60 are likely to cap upside whilst bids at 90.00-89.80 suggest intra-day sideways trading is likely to continue.