Turbo Systems United Co., Ltd. (TSU) was established on October 1, 1998 as a joint venture of ABB K. K. and IHI Corporation. TSU is the sales and service organization for ABB and IHI turbocharger products in Japan applied on large diesel and gas engines for ships, power stations, gen-sets, diesel locomotives and large off-highway vehicles. TSU works closely with engine builders from the initial design stage, providing the highest level of application engineering and support for the customer through installation as well as operating fully integrated in the ABB Turbocharing worldwide sales and service network.