Ogawa, K.; Kosugi, T.; Kato, N.; Kawawata, Y. (1989). "The world's first use of 500 kV XLPE insulated aluminium sheathed power cables at the Shimogo and Imaichi power stations". IEEE Transactions on Power Delivery. 5 (1): 26–32. doi:10.1109/61.107251.
"Key Issues: 11- Benefits due to Power Generation"(PDF). IEA Hydropower Implementing Agreement Annex VIII - Hydropower Good Practices: Environmental Mitigation Measures and Benefits Case Study 11-02: Benefits Due to Power Generation – Large Scale Pumped Storage Power Plants, Japan. Retrieved 6 November 2017.