| Revenue | 31/12/2017 | 31/12/2016 | 31/12/2015 | 31/12/2014 |
| Total revenue | 1,959,800 | 1,993,900 | 1,932,100 | 1,876,300 |
| Cost of revenue | 933,500 | 923,000 | 841,400 | 718,600 |
| Gross profit | 1,026,300 | 1,070,900 | 1,090,700 | 1,157,700 |
| Operating expenses |
| Research development | - | - | - | - |
| Selling general and administrative | 135,700 | 112,000 | 106,900 | 105,100 |
| Non-recurring | - | - | - | - |
| Others | -17,000 | -11,700 | -10,000 | -13,600 |
| Total operating expenses | 1,052,200 | 1,023,300 | 938,300 | 810,100 |
| Operating income or loss | 907,600 | 970,600 | 993,800 | 1,066,200 |
| Income from continuing operations |
| Total other income/expenses net | 4,848,100 | 2,541,300 | 1,149,100 | 471,200 |
| Earnings before interest and taxes | 907,600 | 970,600 | 993,800 | 1,066,200 |
| Interest expense | -103,900 | -97,000 | -100,400 | -103,800 |
| Income before tax | 5,755,700 | 3,511,900 | 2,142,900 | 1,537,400 |
| Income tax expense | 158,600 | 167,300 | 137,200 | 195,700 |
| Minority interest | 34,700 | 20,000 | 35,400 | 50,300 |
| Net income from continuing ops | 5,597,100 | 3,344,600 | 2,005,700 | 1,341,700 |
| Non-recurring events |
| Discontinued operations | - | - | - | - |
| Extraordinary items | - | - | - | - |
| Effect of accounting changes | - | - | - | - |
| Other items | - | - | - | - |
| Net income |
| Net income | 5,585,400 | 3,346,300 | 2,011,700 | 1,327,400 |
| Preferred stock and other adjustments | - | - | - | - |
| Net income applicable to common shares | 5,585,400 | 3,346,300 | 2,011,700 | 1,327,400 |