JHILL consists of the following 4 high-voltage laboratories, academic advisors and related industries; and is active as an organization representing Japan in the field of high voltage technique and testing.

Toshiba Corporation

Hamakawasaki High Voltage and High Power Testing Laboratory (RTL00630)

Mitsubishi Electric Corporation

High Voltage & High Power Testing Laboratories (RTL01120)

Central Research Institute of Electric Power Industry

http://criepi.denken.or.jp/en/electric/index.html

Nissin Electric Co,.Ltd.

High Voltage and High Power Testing Laboratory (RTL03480)

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