Mitsubishi Paper (Pre-Press) Mitsubishi Paper GmbH, which has its headquarters in Düsseldorf, was founded in 1989 and is a wholly owned subsidiary of Mitsubishi Paper Mills, Japan. The company is responsible for marketing solutions and systems for the European pre-press and printing industry, as well as providing technical support for European customers. When a printing shop goes over to Computer to Plate (CtP), the company provides advice, training and support for printers in its own CtP service and training centre.