TOKYO, April 22 - Japan's diffusion index of leading economic indicators for February was revised up to 60.0 from a preliminary 55.6 on Tuesday. The February coincident index, which indicates current economic conditions, was also marked up to 80.0 from a preliminary 77.8, the Cabinet Office said. The lagging indicator was unchanged from an initial reading of 100.0. The leading index, compiled using data such as the number of new job offers, consumer sentiment and Tokyo share prices, is taken to signal economic conditions for the next few months.//