AEON MALL Makuhari New-City GRAND/PET | U.S. Green Building Council
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LEED BD+C: Core and Shell v3 - LEED 2009


1-1 Toyosuna
Mihama-ku, Chiba-shi
Chiba, 2618535

LEED Gold 2014

The mall opened as the flagship store of Aeon Mall in December 2013 and is the first LEED Gold certified shopping mall in Japan.

Aeon Mall Makuhari New City consists of Grand Mall, Pet Mall, Family Mall and Active Mall. The mall opened as the flagship store of Aeon Mall in December 2013 and is the first LEED Gold certified shopping mall in Japan. In addition to the Grand Mall and Pet Mall, the Family Mall and Active Mall also achieved LEED Gold certification.  
Key features/achievements
Advanced LED lighting equipment and a renewable energy generation system enable more than 30% in energy savings, exceeding the criteria determined by the ASHRAE 90.1-2007 standard.
As a result of selecting native plants and introducing a drip irrigation system, the system requires less water than half of what is needed in general practices.
Through water-saving fixtures and a water recycling system using greywater for toilets, it achieves approximately 80% reduction in water use against the minimum requirement of 20% reduction based on the EPAct. As a result of selecting native plants and introducing a drip irrigation system, the system requires less water than half of what is needed in general practices.
In order to reduce the environmental impact of automobile use, preferred parking for fuel-efficient vehicles is available and the bus terminal is built next to the site. For easy access without vehicles, customers and employees can use several bus routes from various railway stations.
In addition to policies of energy saving and waste control, Aeon Mall Makuhari New City aims to provide more comfortable spaces for shoppers as well as tenant stores of the mall through implementation of a LEED certification procedure. Aeon Mall will develop a town in line with nature by introducing the latest technologies to minimize its environmental impact, and create a mechanism to protect the local ecology.
Goals and motivations
What were the top overarching goals and objectives?
Our ambition was not only to make Aeon Mall Makuhari New City Japan’s first large-scale shopping mall in Japan with advanced environmental features, but also to create a distinguished green building project recognized at the international level.
The project was developed under an overarching concept for building a “Smart Community”. The three key pillars of this concept are:
1) Introduction of advanced environmental technologies;
2) A business continuity plan (BCP) in case of natural disasters or other emergencies
3) Efficient use of information systems.
By setting LEED certification as our goal, we gained extra motivation to enhance the use of renewable energy and energy co-generation technologies. Apart from being good for the environment, these technologies contribute to the community’s resilience by becoming an essential source of energy during natural disasters, which unfortunately are not rare in Japan.
What were the most notable strategies used to earn LEED credits?
Aeon Mall Makuhari New City boasts remarkable achievements in the Water Efficiency credit category, showing a 79.6% reduction of water use for Grand Mall / Pet Mall from a baseline scenario. This was achieved through the introduction of greywater use technologies. The flush water for the WCs is supplied through rainwater harvesting and grey water reuse. The greywater is sourced from kitchens and undergoes multistage filtration before being supplied to the WCs. Furthermore, as we put emphasis on business continuity planning, greywater filtration and supply system is designed in such a way that allows its continuous operation even during blackouts. 
How was integrative process applied and what was the greatest benefit gained?
During this project we put a lot of emphasis on teamwork. Working on a green building requires cooperation between various actors: architects, constructors, energy modelling specialists, commissioning authorities, green building consultants, and many others. Furthermore, realizing the importance of information-based decision-making, we made efforts to collect precise data and conduct thorough cost-benefit analysis of different options in order to find the best solutions to achieve LEED certification in a cost-efficient way.
What was the value of applying LEED to this project?
As part of its Corporate Social Responsibility strategy, Aeon engages in various environmental and social activities, with a particular focus on projects that contribute to local communities. In this light, Aeon Mall Makuhari New City is especially proud to be a facility capable of providing shelter and relief in case of disaster outbreak. In the process of earning LEED certification, we discovered a more integrated approach to energy use, including the introduction of renewable energy and cogeneration technologies that can work continuously during blackouts.
In pursuing LEED certification, all involved parties could learn new sustainable building practices. This includes not only architects and constructors, but a wide range of stakeholders such as building tenants, shoppers, AEON employees and local citizens. That being said, LEED has become a powerful tool for raising overall environmental awareness of business owners and general public.     
Lessons learned
What project challenges became important lessons learned?
For us it was an extremely valuable experience to learn a way of thinking about green buildings from global standard point of view. For example, there is a difference between water efficient equipment standards in Japan and those required by LEED. Furthermore, measuring energy use based on electricity bills, rather than on actual amount of consumed energy, is something we never thought about before. Besides, through LEED we learned that it is import to measure air pressure difference between a smoking room and all adjacent rooms. 
One of the biggest challenges we faced in the certification process was aligning the construction schedule with LEED documentation review schedule. The speed of construction in Japan is very high, and we had to be inventive in order to minimize the time and budget costs which stemmed from the mismatch of schedules. Eventually, in our next projects we hope to achieve better synchronicity of construction and LEED submittal review processes. 

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Project details
1,541,639 sf
20 Dec 2014
Data Reporting
Energy Update
Water Update
Transportation Update
Waste Update
Human Experience Update

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