Recently, many houses or buildings have solar panels on their roof for photovoltaic generation. So, currently the solar cell market is expanding. According to Japan Photovoltaic Energy Association, the total shipment in 2013 was 8.5 million kW (www.jpea.gr.jp/pdf/statistics/module_all.pdf). It was 2.2 times volume of 2012's.
Nikkei newspaper estimated the last year's (2013) market share of solar cell in Japan as the following.
Figure: Solar Cell Market Share in Japan, 2013
|Manufacturer||Market share (%)|
Many companies make solar cells. Total 47 companies join in Japan Photovoltaic Energy Association.
The source of the market share is Nikkei Sangyo Shimbun newspaper, the article on 2014 July 28th.