The entire glass division, which includes automotive business, reported Q3 net sales of JPY143.6bn (US$1.85bn) while operating income was JPY 1.8bn.
Total group sales for the three months ended 30 September totalled JPY302bn, down 5.3% year on year.
Group operating income fell 32.5% to JPY 37bn while net income decreased 45.7% to JPY 19.1bn.
The group's net sales for the nine months ending 30 September totalled JPY 916bn (US$ 11.73bn), down 4.7%.
Operating income totalled JPY 136.3bn, down 19.7%, while net income totalled JPY 76.02bn, down 30.5% compared with JPY 109.44bn in 2010.
For the full year to 31 December, the company expects net sales of JPY 1.25 trillion (down 3%), operating income of JPY 170bn (down 25.8%) and net income of JPY 90bn (down 26.9%).