The following are the list of top engineering consultants ( consulting companies ) in Japan :

• Mott MacDonald Engineering is one of the largest  a consultancy employee-owned companies in the world .
• Arup architecture & consulting (officially Arup Group Limited) is a British multinational  professional services firm which provides engineering, architecture, design, planning , project management and consulting services for all aspects of the built environment. 
• Wood is a global leader in consulting and engineering across energy and the built environment.
• Ramboll is a global engineering, architecture and consultancy company.