Japan's Nikkei suffers worst week since Fukushima By: CNBC.com News April 11, 2014 at 04:30 AM EDT The Nikkei 225 finished its worst trading week since March 2011 on Friday, with analysts highlighting a change in sentiment towards Japan's benchmark index. Read More >> Related Stocks: Fast Retailing Co. Ltd Rakuten Group Inc Sumitomo Mitsui TR H ADR