Woonerf Inc. is a leading sustainability consulting firm in Japan and helps clients improve their environmental performance, occupants' well-being and public awareness of ESG (environmental, social and governance) compliance while securing economic benefits.

OUR SERVICES - Consulting for Green Building and other Global Certification

LEED, - Leadership in Energy & Environmental Design, is the most well-recognized set of rating and certification system for green buildings. LEED was developed by the U.S. Green Building Council (USGBC), and has rapidly spread to over 180 countries worldwide.

WELL Building Standard (WELL) is the leading rating and certification tool for advancing health and well-being in buildings and communities globally. WELL has been developed and operated by International WELL Building Institute (IWBI).

WHSR - WELL Health-Safety Rating, is a rating system that indicates the building is operated with consideration for the health and safety of employees and visitors. It is an evidence-based, third-party verified rating system focused on addressing a post-COVID-19 environment now, and broader health and safety-related issues in the future. WHSR started to operate under the International WELL Building Institute in 2020, triggered by the COVID-19 pandemic.

SITES - the Sustainable SITES Initiative program, is a comprehensive certification system for sustainable and resilient landscaping. It was developed through a collaborative, interdisciplinary effort of the American Society of Landscape Architects, The Lady Bird Johnson Wildflower Center at The University of Texas at Austin, and the United States Botanic Garden. USGBC has been a long-time supporter and stakeholder in SITES.

TRUE - Total Resource Use and Efficiency, is a rating system for changing the way materials flow through society so that all products are eventually reused and diverted from landfill, incineration (waste-to-energy), and the environment. TRUE has originally developed by the U.S. Zero Waste Business Council, and started to operate by Green Business Certification Inc. (GBCI) in 2016.

JUST is an innovative social justice transparency platform for organizations to disclose their policy statements, and is not a verification or certification program. JUST is operated by the International Living Future Institute in Seattle in the U.S. As of December 2020, 187 companies around the world acquired JUST label.

Green Business Certification Inc. (GBCI) provides third party project certification for LEED, WELL, WHSR, SITES, and TRUE.

Woonerf is a designated Proven Provider of LEED since April 2017 and became a JUST organization in February 2021. Woonerf’s team of LEED, WELL, SITES, TRUE Accredited Professionals provide comprehensive support to ensure that projects achieve respective certification.
Woonerf provides the following green building consulting services:
- LEED, WELL, WHSR, SITES, TRUE feasibility study:
Assessment of project's potential to achieve certification; the most appropriate system; and the required actions to achieve the intended rating.
- LEED, WELL, WHSR, SITES, TRUE certification consulting:
Full spectrum of consulting services to assist you in achieving respective certification for various types of new and existing projects. -
- Green buildings and urban development research:
Multiple research projects, including comparative analysis of certification systems (LEED, CASBEE, BREEAM, Green Star, etc. ), assessment tools design, case studies, etc.

OUR SERVICES – Landscape

-Sustainable Landscape Design​
We aim to provide landscape design, management guidelines, and advice to reduce the environmental burden by utilizing native plants suitable for the local environment, creating spaces that contribute to biodiversity, promoting the natural water cycle by using rainwater, and using planting plans to reduce the use of irrigation, chemicals, and fertilizers. We also make proposals based on concepts and standards of international environmental certification evaluation systems such as LEED and SITES in the practice of biophilic design and green infrastructure that contribute to a peace of mind.​

OUR SERVICES – Research and advisory work on regional revitalization and urban design

We provide support for regional revitalization, buildings aiming for net zero, research and policy formulation for local governments, and implementation. In addition, we provide services such as comprehensive sustainability evaluation of buildings and towns*1, energy performance evaluation*2, ESG benchmarks*3 for achieving carbon neutrality and SDGs, identification of issues, presentation of solutions, and implementation support. We provide a wide range of support for both the private sector such as companies and financial institutions and the public sector such as local governments and the national government.

*1 Comprehensive building environmental performance evaluation ... LEED, CASBEE, BREEAM (UK), etc.
*2 Environmental performance evaluation specializing in building energy performance ... Energy Star (US), NABERS (Australia), EPC (UK), etc.
*3 Evaluation and improvement proposals for ESG (environment, society, governance) important indicators in buildings, interior spaces, communities, and local governments using the Arc platform

Principal's Message

Our vision is to promote sustainable urban environment and to make our cities greener, more walkable and comfortable for all citizens. We strive to reduce human impact on environment and be responsible stewards of natural resources in order to secure healthy legacy for next generations. We commit to continuous work in close association with various stakeholders to ensure constantly improving quality of building stock and regional ecology. We aim at spreading Japanese experience in creating comfortable spaces around the world, using the common language of international certifications. We aspire to develop a new market based on green building innovations and technologies, and make a positive impact by generating meaningful and rewarding jobs in environmental sector.

Hiramatsu, Hiroki

Founder & CEO
Founding Co-Chair, Green Building Japan (Group of LEED Professional Group in Japan)
USGBC Faculty (accredited LEED Instructor)
EcoDistrict AP
First-class Landscape Planning and Management Engineer
Part-time Lecturer at Kyoto University of Art and Design
CASBEE Real Estate Assessment Accredited Professional

Hiroki Hiramatsu was born in Hamamatsu city, Shizuoka Prefecture. He graduated from Osaka University of Foreign Studies in 1984 and started his career at the securities company. After devoting almost 20 years to financial industry, Hiroki left Merrill Lynch, where he was heading Fixed Income Division, and switched his professional focus to landscape design and green building industry. In 2006, after gaining experience at NPO Japanese Xeriscape Design Association, Hiroki established Woonerf. Hiroki continues to promote sustainable urban renovation through integrating green building concepts and landscape design, blending it with green economy and financial system.

Committee membership and participation:
-2012 Agusut - present.
The Chairman of Working Group: The Committee for 21-st Century Green Real Estate based on Financial Conduct Principles (Ministry of Environment)
-2010 May – present
Member of Japanese Sustainable Architecture Assocciation – a Subcommittee for the Study of CASBEE Real Estate Assessment.
-2013 April - present
Member of Japanese Architecture Institute – a Subcommittee for Sustainable Building Assessment Indicators
-2009 April – present
Member of Steering Committee - SIF-Japan (NPO Japan Sustainable Investment Forum)
Member of a Study Group on the Role of Real Estate Market for Environment (Ministry of Land, Infrastructure, Transport and Tourism).

Presentations and publications:
Co-author of “Sustainable Real Estate” (2009), published by Gyosei, Co.ltd.
Hiroki Hiramatsu is an active lecturer and author of many articles and publications.

Koyama, Nobuaki
CPA – Inactive
Auditor - Secretary, Green Building Japan (Group of LEED Professional Group in Japan)


Nobuaki Koyama was born in Kanagawa prefecture. After graduating from Meiji University with degree in Economics in 1988, he started his career at Manufacturers Hanover Securities Company, Tokyo branch. Later he worked for Merrill Lynch, where he gained rich experience in debt management, securitization of commercial facilities, J-REIT and private placement funds management.
From the middle of 2000-s Nobuaki gradually started to gain interest in green building industry. In 2010, after conducting a research for MLIT on Responsible Property Investment, he joined Hiroki Hiramatsu at Woonerf and became an indispensable member of the team. Nobuaki now works on LEED ID+C, WELL certification consulting, financial and administrative management.

Committee membership and participation:
-2012 – 2015
Member of Subcommittee on CASBEE Tenant Office Study.

Nagazumi, Noriko
Co-chair of the board, Green Building Japan (GBJ)
LEED fellow
EcoDistrict AP


Noriko is a founding member of Woonerf Inc., providing landscape design and consulting services related to urban and architectural sustainability. As the Chief Operations Officer of Woonerf Inc., Noriko oversees many LEED, WELL and SITES certification projects. She has been a LEED AP since 2008, and became a LEED fellow in 2018.

Company Profile
Corporate name: Woonerf Inc.
President: Hiramatsu, Hiroki
Capital stock: JPY 22 million
Year of Foundation: 3 April 2006
Office address:

Tokyo office:
N-cross KUDAN 2F, 4-3-26, Kudan-kita, Chiyoda-ku, Tokyo 102-0073 Japan

Osaka office:
WeWork Midosuji Frontier 5F,1-13-22 Sonezakishinchi, Kita-ku, Osaka 530-0002 Japa

Lake Hamana satellite office:
1261, Araichoarai, Kosai-shi, Shizuoka 431-0302 Japan

Tel: +81-(0)3-5213-4832
Fax: +81-(0)3-5213-4451
Affiliated company
Corporate name: Arc Japan Inc.
Office address: Place W, N-cross KUDAN 1F, 4-3-26, Kudan-kita, Chiyoda-ku, Tokyo 102-0073 Japan
Arc Japan Inc. was founded jointly by Arc Skoru Inc., Development Bank of Japan (DBJ), and Woonerf in February 2021.