Enabling a low carbon future
Less talk, more action


MBK Arup Sustainable Projects Limited (MASP) is a joint venture between the trading and investment conglomerate, Mitsui & Co., Ltd, and the global design, planning, engineering and management consultancy, Arup. Combining the technical expertise of Arup and the financial muscle of Mitsui, MASP brings viable, low carbon initiatives to market.

Based in London, MASP develops and funds opportunities worldwide for low carbon investment from building retrofit, district heating systems and renewable energy to low carbon transport and logistics.

Few doubt that society must find solutions to current and future challenges, from climate change to energy security. There is no shortage of ideas, but there are significant challenges in getting projects off the ground.

This is where we step in

About Arup

Arup is the creative force at the heart of many of the world’s most prominent projects in the built environment and across industry. From 90 offices in 35 countries our 10,000 planners, designers, engineers and consultants deliver innovative projects across the world.


About Mitsui

Mitsui & Co., Ltd. is one of the world’s most diversified comprehensive trading, investment, and service companies. Headquartered in Tokyo, Mitsui maintains a global network of 155 offices in 67 countries, as well as nearly 450 subsidiaries and associated companies worldwide.


If you are interested in seeing how we can help you please get in touch with us via email.