TOKYO, Feb 2 - Japanese stocks ended flat on Monday as caution ahead of a Group of Seven finance ministers' meeting this weekend limited gains in certain sectors, such as autos after Honda Motor's <7267.T> surprisingly strong quarterly earnings. The key Nikkei average <.N225> edged down 0.06 percent or 6.88 points to 10,776.73, while the broader TOPIX index <.TOPX> was up 0.19 percent at 1,049.46.//