TOKYO, Feb 9 - Tokyo stocks ended down on Monday as a warning by the Group of Seven nations against volatility in currencies failed to lift the market and investors sold large-cap shares to tidy their books before the fiscal year ends in March. The Nikkei average <.N225> closed down 0.56 percent at 10,402.61, adding to last week's 2.99 percent fall. The broader TOPIX index <.TOPX> slipped 0.39 percent to 1,024.77.//