A platform for
social action
in Japan

rainbow-bridge-2086645 cropped.jpg

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.

20180119 Social Innovation Japan70.jpg


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

Co-founder / Director

Mariko is co-founder and Director of Social Innovation Japan and an independent consultant.

A former journalist, she has planned, managed and delivered international, multi-stakeholder projects for government, corporations and social ventures, including as Programme Manager for a UK government campaign to facilitate innovation partnerships between the UK and Japan and as Overseas Marketing lead for Earth Company, a social enterprise.

She now leverages her experience to build greater cross-sector engagement with social and environmental issues via Social Innovation Japan, consults businesses and social ventures, and is the Tokyo lead for the Circular Economy Club.


Robin Lewis

Co-founder / Director

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.

Screen Shot 2019-06-16 at 7.01.43 PM.png

Keiko Ono

Co-founder / Director

Born of Japanese - Papua New Guinean heritage, Keiko is the co-founder of Social Innovation Japan and concurrently works at Google APAC where she focuses on building diversity and inclusion in tech.

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 (i.e. climate change in small island developing states).

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:

Social_Innovation_Japan_Blockchain x SDGs.jpg

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 *
Social Innovation Japan_Join Us.jpg