Japan's manufacturing activity grew at its fastest pace in about four years in February, buoyed by strong domestic and overseas demand, a private sector survey showed on Friday, an encouraging sign for Prime Minister Sanae Takaichi's economic revival plans. The S&P Global flash Japan Manufacturing Purchasing Managers' Index (PMI) rose to 52.8 in February from 51.5 last month, marking the strongest growth since May 2022. Readings above 50 indicate growth in activity, while those below 50 signal contraction.