Customers, Sales and Maintenance Business Partners

Power company
Hokkaido Electric Power Co., Inc.
Tohoku Electric Power Co., Inc.
Tokyo Electric Power Co., Inc.
Chubu Electric Power Co., Inc.
The Kansai Electric Power Co., Inc.
The Chugoku Electric Power Co., Inc.
Shikoku Electric Power Co., Inc.
Kyushu Electric Power Co., Inc.
The Okinawa Electric Power Co., Inc.
Gas company
Tokyo Gas Co., Ltd.
Osaka Gas Co., Ltd.
Toho Gas Co., Ltd.
etc.(10 company in total)
Bureaus of Waterworks of Cities and Towns
Sapporo City
Tokyo Metropolitan Government
Kawasaki City
Osaka City
Kobe City
etc.(160 bureaus in total)
System company
Tepco Systems Co., Inc.
Energia Communications Co., Inc.
Q-Den Business Solutions Co., Inc.
Dai-Ichi Kankyo Co., Ltd.