U.S. stock indexes plunged on Wednesday after retailer Target's TGT.N earnings showed the toll of rising price pressures, sending the benchmark Nikkei share average .N225 and other major Asian indexes lower. TOKYO, May 19 (Reuters) - Japanese government bond (JGB) futures rose on Thursday, as investors sought save-haven assets after Wall Street plunged overnight on fears that surging inflation would eat into corporate profits and trigger an economic slowdown. Benchmark 10-year JGB futures 2JGBv1 rose 0.05 point to 149.57, with a trading volume of 12,002 lots.