TOKYO, Feb 12 - Tokyo stocks ended higher on Thursday on buying of Olympus Corp <7733.T> and other recently battered shares, but gains were capped as institutional investors trimmed their stockholdings ahead of the March fiscal year-end. Large-cap shares such as Advantest Corp <6857.T> and NTT DoCoMo Inc <9437.T> were sold, offsetting the positive effect of Federal Reserve Chairman Alan Greenspan's comments suggesting no U.S. interest rate increase was imminent despite strong growth in the U.S. economy, traders said. The Nikkei average <.N225> ended up 0.91 percent or 93.86 points at 10,459.26, springing back from its 0.36 percent slide to a seven-week low on Tuesday. Tokyo markets were closed on Wednesday for a national holiday. The broader TOPIX index <.TOPX> gained 0.55 percent or 5.66 points to 1,030.91.//