Question: New Zealand DSJ class locomotive was first assembled by what company that produced diversified products like information technology and communications equipment and systems, electronic components and materials, power systems, industrial and social infrastructure systems, consumer electronics, household appliances, medical equipment, office equipment, as well as lighting and logistics.? 
Sentence (from "Hitachi"): It is the parent company of the Hitachi Group ("Hitachi Gurūpu") and forms part of the DKB Group of companies.
Relevant evidence: No