1. Japanese Industrial Standard. “JIS C4304:2013 “6‐kV Oil‐immersed distribution transformers” JIS C4306:2013 “6‐kV Encapsulated‐winding distribution transformers”.
2. Amorphous transformer contributing to global environmental protection;Inagaki K;Hitachi Review,2011
3. The Federation of Electric Power Companies of Japan.FY2015 Electricity Demand Report http://www.fepc.or.jp/library/data/demand/_icsFiles/afieldfile/2016/04/28/juyou_k_fy2015.pdf(in Japanese)