Dollar and euro rose marginally after Bank of Japan (BOJ) downgraded its economic assessment in its monthly report. -- BOJ report said economic adjustment intensifying, citing big fall in output. -- Reaction fairly limited as downgrade already anticipated after recent run of gloomy Japanese data. -- Greenback quoted at 122.97/07 yen , about 0.10 yen higher than levels before BOJ report, and slightly above 122.89 yen at end of last week. -- Euro a touch firmer at 86.39/40 cents and 106.19/30 yen , compared with 86.11 cents and 105.83 yen in New York. -- Euro also helped by speculation that European Central Bank (ECB) could follow suit to buy euro, triggered after Swedish central bank's intervention to support the crown on Friday.