Tokyo stocks opened lower on Monday, playing catch-up after a four-day weekend, with global risk aversion on intensifying China-US tensions. The benchmark Nikkei 225 index fell 1.12 percent or 255.66 points to 22,495.95 in early trade while the broader Topix index lost 1.04 percent or 16.29 points to 1,556.67. mis/sah/axn