Kenichi Haji, Yoshinobu Seto, Ryouichi Nagata, Yoshito Kusuhara. Evaluation by the PR method regarding the power generation ability of volcanic ash from Sakurajima on Equipment of photovoltaic generation. The journal of the Institute of Electrical Installation Engineers of Japan. 2021. 41. 7. 47-52
Kenichi Haji. Study on electrical characteristics of volcanic ash. The international workshop GEMS2023. 2023
S.Yamasaki, K.Haji. Influence of electrical discharge between water electrodes on glass and silicone rubber surfaces. The international workshop GEMS2022. 2022
K.Hidaka, K.Haji. Observation of electric discharge caused by volcanic ash deposited on polymer surface. The international workshop GEMS2022. 2022