By Chikako Mogi TOKYO (Reuters) - Asian shares retreated on Friday after recent gains, with investor confidence underpinned by Wall Street's record-high close overnight, while the yen hovered near four-year lows against the dollar. European markets were likely to ease also, with financial spreadbetters predicting London's FTSE 100 , Paris's CAC-40 and Frankfurt's DAX to open down as much as 0.5 percent. U.S. stock futures were also down 0. ...