| Revenue | 2018-12-31 | 2017-12-31 | 2016-12-31 | 2015-12-31 |
| Total Revenue | 5,460,800 | 5,079,200 | 3,235,900 | 2,946,900 |
| Cost of Revenue | 4,430,900 | 4,195,800 | 2,605,500 | 2,408,500 |
| Gross Profit | 1,029,900 | 883,400 | 630,400 | 538,400 |
| Operating Expenses |
| Research Development | - | - | - | - |
| Selling General and Administrative | 174,400 | 133,400 | 83,700 | 58,200 |
| Non Recurring | - | - | - | - |
| Others | - | - | - | - |
| Total Operating Expenses | 5,143,100 | 4,867,800 | 2,957,400 | 2,699,700 |
| Operating Income or Loss | 317,700 | 211,400 | 278,500 | 247,200 |
| Income from Continuing Operations |
| Total Other Income/Expenses Net | -194,000 | -544,500 | -128,800 | -83,600 |
| Earnings Before Interest and Taxes | 317,700 | 211,400 | 278,500 | 247,200 |
| Interest Expense | -300,800 | -274,000 | -121,500 | -106,000 |
| Income Before Tax | 123,700 | -333,100 | 149,700 | 163,600 |
| Income Tax Expense | 13,600 | 154,100 | 38,000 | 59,700 |
| Minority Interest | - | - | - | - |
| Net Income From Continuing Ops | 110,100 | -487,200 | 111,700 | 103,900 |
| Non-recurring Events |
| Discontinued Operations | - | - | - | - |
| Extraordinary Items | - | - | - | - |
| Effect Of Accounting Changes | - | - | - | - |
| Other Items | - | - | - | - |
| Net Income |
| Net Income | 110,100 | -487,200 | 111,700 | 103,900 |
| Preferred Stock And Other Adjustments | - | - | - | - |
| Net Income Applicable To Common Shares | 110,100 | -487,200 | 111,700 | 103,900 |