Japan: IHI Corporation; IHI Machinery and Furnace Co., Ltd.; Topy Industries Limited; Topy Enterprises, Limited; Hokuriku Kogyo Co., Ltd.; CoorsTek KK; Nippon Carbon Co., Ltd.; Resonac HD Yamagata Corporation; DISCO Corporation; Noritake Co., Limited; Noritake TCF Co., Limited; Niigata Transys Co., Ltd. ; Mitsubishi Shindoh Co., Ltd.; Okaya & Co., Ltd.; Japan Atomic Energy, Agency; government ministries and agencies; universities, etc. Overseas: Komatsu (Shandong) Construction Machinery Corp.; PT., Komatsu Undercarriage Indonesia; Topy Undercarriage (China) Co., Ltd; government ministries and agencies; universities, etc.