Japan's Shirai says the timing of BOJ's negative rates was poor via ForexLive

Former Bank of Japan board member Shirai out on Bloomberg 1 June 2016 - not much choice but to keep negative rate policy now - not completely against neg rates Shirai left the BOJ on 31 March having served served for 5 years and generally voted with Kuroda but was one of 4 dissenters on neg rate introduction in Jan