Nissan Motor net income after taxes dipped 12% year on year to JPY183.4bn (US$2.3bn, EUR1.61bn) in the first fiscal half year to 30 September, 2011. Revenue was up 1.1% to JPY4.3674 trillion ($54.73bn, EUR38.41bn). Operating profit was down 7.5%, to JPY309.7bn ($3.88bn, EUR2.72bn and operating profit margin was 7.1%.