Nikkei eases from six-mth high but still above 9

* Nikkei down 0.2 pct, eases from 6-month high * Mazda shed 8 pct on 162 bln yen share offering plans * Banks drop in line with decline in U.S. financials * Euro zone economic contraction worries market By Mari Saito TOKYO, Feb 23 (Reuters) - Japan's Nikkei share average eased from a six-month high, hurt by signs of weak business activity in Europe but managed to hold above 9,500, a level it topped in the previous session on improvement in China's manufacturing sector.