1. Ministry of Economy, Trade and Industry Long-term energy supply and demand outlook http://www.meti.go.jp/press/2015/07/20150716004/20150716004_2.pdf
2. Agency for Natural Resources and Energy On cost trends by generator type (PV/Wind power) http://www.meti.go.jp/committee/chotatsu_kakaku/pdf/025_01_00.pdf
3. NEDO R&D in wind power generation and other technologies: basic plan http://www.nedo.go.jp/content/100570084.pdf
4. Report of study group for reinforcement of competitiveness in wind power generation http://www.meti.go.jp/committee/kenkyukai/energy_environment/furyoku/pdf/report_01_01.pdf 2016
5. NEDO Wind power generation technologies: state of the art and roadmap http://www.nedo.go.jp/content/100116324.pdf 2011