JR East Rail Car Technology & Maintenance Co., Ltd.
(East Japan Railway Company Group)

Tokai Rolling Stock & Machinery Co., Ltd.
(Central Japan Railway Company Group)

West Japan Railway Technos Co., Ltd.
(West Japan Railway Company Group)

Goto Kogyo Co., Ltd.
(West Japan Railway Company Group)

Shikoku Rolling Stock & Machinery Engineering Co., Ltd.
(Shikoku Railway Company Group)

JR Kyushu Engineering Co., Ltd.
(Kyushu Railway Company Group)

Japan Freight Railway Company

Hankyu Corporation

Keihan Electric Railway Co., Ltd.

Sanyo Electric Railway Co., Ltd.

NAGADEN Technical Service K.K.
(NAGADEN Group)

Nankai Vehicles Service Engineering Co.,Ltd.
(Nankai Electric Railway Group)

Kobe Electric Railway Co., Ltd.

Hanshin Electric Railway Co., Ltd.

Keifuku Electric Railroad Co., Ltd.

Nagasaki Electric Tramway Co., Ltd.

Hiroshima Electric Railway Co., Ltd.

Seibu Railway Co., Ltd.

Nose Electric Railway Co., Ltd.

Hokuriku Railroad Co., Ltd.

Okayama Electric Tramway Co., Ltd.

Nagoya Railroad Co., Ltd.

Echizen Railway Co., Ltd.

Toyama Chiho Railway Co., Ltd.

Konan Railway Co., Ltd.

Osaka Metro Co., Ltd.

Hankai Tramway Co., Ltd.

Kurobe Gorge Railway Co., Ltd.

Kumamoto City Transportation Bureau

Kita-Osaka Kyuko Railway Co., Ltd.

Sapporo City Transportation Bureau

Mitsubishi Electric Corporation

Toshiba Corporation

Hitachi, Ltd.

Sapporo Rolling Stock & Machinery Co., Ltd.