A platform for
social action
in Japan

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Our Mission

We are building Japan's largest and most diverse platform of change-makers.

We work with entrepreneurs, nonprofits, governments, big business and academia, breaking down silos and mobilising people - providing them with the tools, information, and network they need to tackle real-world problems.


Recent News


What we do



Providing a platform for mission-driven individuals and organisations to connect and collaborate.



Building the capacity of change-makers through education and training.

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Raising awareness of social problems and being an incubator for effective solutions.



Supporting purpose-driven organisations to take on social and environmental problems.


Who are we?

Social Innovation Japan’s founding team (below) brings together cross-sector, international experience and a deep commitment to an all-of-society approach to solving the greatest social, economic and environmental challenges we face.

We are a rapidly growing community of individuals and organisations who share a common vision, with many dedicating their time and skills to shake things up and make good things happen.

Together, we are creating a movement for change from Japan, with the rest of the world.


Mariko McTier

Mariko has a professional background that spans countries and industries - from journalism and social enterprise to international trade and investment - and has developed a holistic understanding of many of Japan and the world’s challenges, as well as Japan’s untapped potential to drive social change.

Mariko has leveraged her cross-cultural, cross-discipline background to plan and execute cross-border projects for government, corporates and social ventures.

She co-founded Social Innovation Japan with a mission to facilitate a flow of resources across borders for positive change, and currently enjoys a ‘portfolio career’ working on social impact projects.


Robin Lewis

Robin is a consultant at the World Bank, where he specialises on issues related to climate change and disaster resilience. His work has spanned 20+ countries, from clean water projects in Haiti to disaster education in Mozambique, to post-earthquake recovery in Nepal.

He has 8 years of full-time experience working with social businesses, NGOs and intergovernmental organisations, including in project management, fundraising, strategy and business development.

In 2017, Robin took on a sponsored expedition, walking 600+km along Japan’s disaster-affected coastline to document the recovery from the 2011 tsunami and Fukushima nuclear crisis. He has an M.A. in International Business from the University of Edinburgh and is a TEDx Speaker.

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Keiko Ono

Keiko is a Japanese - Papua New Guinean graduate in Politics and Development and currently works at Google Japan. Her mission is to share stories to protect the environment and empower the people in it.

Having lived and worked between +10 countries between Africa and Asia-Pacific, her experience has primarily been in non-profit and public sector work with a focus on education and non-traditional security challenges. Her career has also included playing competitive sports on a national level and she continues to be a strong advocate of sports and social impact.

Currently based in Tokyo, Keiko is also the executive director of a US-based non-profit, and mentors young leaders as part of the Global Citizen Initiative.


Our Partners

We are lucky to be working with industry leaders both in and out of Japan, including:

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Get Involved!

Corporate Partnerships

Are you a company looking to make systemic change in society? We would love to hear from you to discuss how we can help you on your mission.


Want to position your brand alongside the social innovation movement? Drop us a line to discuss opportunities.


Looking for a skilled developer, marketing expert, or just a bit of help to boost your fundraising campaign? Get in touch to see how we can help.


We're looking for passionate people to build critical mass and kickstart this movement together. Fancy a meaningful challenge? Join us!

Contact Us - General Enquiries

(to sign up for volunteer opportunities please click on “volunteer registration” above)

Name *
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