TOKYO, Feb 6 - Japanese stocks ended virtually unchanged on Friday as investors closed their positions ahead of a G7 meeting and U.S. jobs data, selling recent gainers like drug shares and buying back Sharp Corp <6753.T> and other blue chips. Media reports that the government would sell shares in West Japan Railway Co (JR West) <9021.T> also weighed on the market, raising worries about supply. The Nikkei average <.N225> closed a tad lower, down 0.04 percent or 3.68 points at 10,460.92, while the broader TOPIX index <.TOPX> edged up 0.33 percent to 1,028.83.//