Accounting (Unit:Thousand yen)
2013 2014 2015 2016 2017 2018
Sales amount 2,618,689 3,089,923 2,876,914 3,078,824 3,086,502 3,111,024
Amortization cost 1,160,977
(*1)		 691,520
(*2)		 322,917
(*3)		 167,007
(*4)		 98,467 119,668
Before refund profits 392,451 497,723 573,014 621,146 639,214 783,030
Self-capital ratio 36.17% 27.74% 32.37% 33.77% 27.13% 24.58%

(*1):The increase in amortization expense for 2013 was due to the 100% depreciation cost for the total of 4MW solar power plants.
(*2):The amortization expense for 2014 was due to the 100% depreciation cost for the total of 2MW solar power plants.
(*3):The amortization expense for 2015 was due to the 100% depreciation cost for the total of 1MW solar power plant.
(*4):The amortization expense for 2016 was due to the 30% depreciation cost for the total of 1MW solar power plant.