OUR PARTNERS
mymizu works with wonderful, diverse partners in order to achieve our goals. For more details, please see our partners page!
NEWS UPDATES
The mymizu app now includes 12,000+ Cooling Shelters across Japan, alongside nearly 15,000 refill spots!
mymizu is excited to co-host a special online talk with Hachidori Denryoku on Tuesday, August 4, 2026.
mymizu welcomes waterdrop® as our Official Hydration Partner - the future of hydration starts here!
We're excited to share that mymizu has recently been featured in Yomiuri Shimbun and by FBS Fukuoka Broadcasting's morning TV program Barihaya!.
We’re excited to share that Social Innovation Japan (SIJ), the nonprofit organisation behind mymizu, has been approved as an Environmental Partner of 1% for the Planet.
mymizu participated in City Green Fes through a collaborative booth with microdrink brand waterdrop®.
mymizu is currently inviting people to join the “mymizu Supporter” program, which starts from just ¥500 per month. Alongside this, we’ve also launched a set of new supporter gifts.
Social Innovation Japan, the organisation behind mymizu, has launched a new partnership with Hachidori Denryoku, a provider of 100% renewable energy. This initiative will begin on Earth Day, April 22, 2026.
On April 23rd, mymizu Co-Founder & Co-CEO Mariko McTier spoke at Apple Marunouchi in Tokyo as part of “Today at Apple” for Earth Day.
A KNT365 POP-UP will be held at Isetan Shinjuku (1F Isetan Leaf) from April 22 (Wed) to May 5 (Tue), 2026.
On 23 April, mymizu co-founder Mariko will be speaking at Today at Apple in Marunouchi.
Spotlight: What We Can Do for the Planet with Mariko McTier
The Refill for the Ocean Campaign launched on 20 September 2025 and concluded on 31 December 2025. Each refill on its own may seem small. But when thousands of people take action together, those everyday moments add up to something powerful.
mymizu awarded the “4th Kameoka Environmental Award” at the Kameoka City Civic Ceremony in Kyoto, November 2025.
Six years after the launch of mymizu, 2025 marked another meaningful step in our journey to expand free water refills across Japan and the world—made possible by the continued support of our community.
mymizu was selected as a winner at the Youth Co:Lab Social Innovation Challenge Japan 2025 – Alumni Grand Prix Demo Day at AWS Japan in Tokyo!
Looking for a “Partnerships & Impact Manager” and “Operations & Events Coordinator” to join our core team!
Bringing together 28 students from across Japan at the University of Tokyo to develop actionable solutions to make a positive impact!
From June 5th to July 4th, six universities in Tokyo’s Chiyoda ward - including Hosei University and Senshu University - will run the mymizu Challenge to compete to see who can save the most single-use plastic bottles using the mymizu app!
mymizu BLOG
Even when we are already taking action for the environment, it is easy to wonder: does what I do as one person really make a difference? That was at the heart of our recent conversation between mymizu Co-founder Mariko McTier and Hachidori Denryoku Representative Kazunari Taguchi.
waterdrop® is mymizu's Official Hydration Partner. Simply refill your reusable bottle and add a waterdrop® cube to enjoy a flavored option to suit your mood. We asked four members of the mymizu team to share their favorites. 💧
The mymizu Supporter program is a way to continuously support our activities, starting from just ¥500 per month.
We’re excited to share that we have prepared several new benefits for mymizu Supporters 🌿
The water you drink. The energy you use. When those everyday choices begin to change, society can begin to change too.
In the summer of 2025, we released a new in-app feedback feature that makes sharing your experience much easier.
The Refill for the Ocean Campaign launched on 20 September 2025 and concluded on 31 December 2025. With heartfelt gratitude to everyone who took part - thank you for being part of this movement!
Six years after the launch of mymizu, 2025 marked another meaningful step in our journey to expand free water refills across Japan and the world—made possible by the continued support of our community.
mymizu was created to encourage people to make better use of Japan’s clean, safe tap water.
In this blog, we’ll cover: Why Japanese tap water is safe and beneficial, tips for making tap water taste even better, and how we can all contribute to a sustainable future.
Celebrating five years since our launch, 2024 has been a landmark year in our journey towards a more sustainable society, thanks to your invaluable support!
Recently, our strategic partner, MEISUI Co., and mymizu visited the British School in Tokyo (“BST”) in Azabudai Hills!
The school is equipped with more than 20 MEISUI filtered water coolers. The children bring their favorite bottles to school and use the water servers to refill their bottles.
This summer, the mymizu team was excited to welcome Eva, an intern from the U.S., who joined our tech team! Eva worked on the mymizu app, contributing to research, design, and app development. Here, she shares her experience of learning new skills—like mobile app development—and exploring Japan for the first time.
A look back at our collective impact in 2023 and some of our favourite community stories
The inspiring story of University of Tokyo students who successfully campaigned to install water servers on campus 💪
When a bunch of programmers come together with a common cause, remarkable things happen.
A recap of how mymizu web came to be and the community and hackathon that made it happen.
2022: another big year for mymizu! Here’s a look back at our impact in 2022, including a message from our co-founders and a highlights video.
Here’s a list of eco-friendly businesses, apps, ideas and resources to help you kickstart your Zero Waste lifestyle in Japan!
In MixPanel’s “Ask an Expert” series, Product Lead at mymizu Tanmay Goel explores building the product vision, encouraging active usage, and why data and metrics matter.
mymizu Co-founder Robin Lewis reflects on 10 lessons we’ve learnt since launching in 2019.
$30,000. 30 days. 1 mission. What we learnt from running a Kickstarter campaign that was funded in 48 hours.
Bulk food shops are slowly gaining more popularity in Japan but it could still be a struggle to find one in your neighborhood. In Australia, however, bulk shops tend to be quite accessible as there are a few located in each city. I recently had the opportunity to interview Jess Smith, the owner of Ningaloo Bulk Foods. By reading this article, you will find the key to the success and behind-the-scenes of her zero-waste bulk shop!
With the outbreak of COVID-19, the consumption of single-use plastics has been on the rise, perhaps due to their perceived hygieniene or convenience. Now, are plastic products really that hygienic compared to reusable products? You may be surprised to know how easy it is to lead a wallet-friendly plastic-free life! All you need to do is incorporate some new habits into your daily life. In this article, we will introduce you 10 practical tips for living plastic-free in Japan. Get ready to be blown away!
In the previous article, we discussed the origin of marine plastics and microplastics, and their impact on our health. But why is there such a large amount of marine plastic waste in the first place? Annual global production of plastic has increased 20 times in the last 50 years.
The annual output of plastic is about 380 million tons, which is equivalent to the weight of all mankind. As I mentioned in the first part, 8 million tons, about seven Tokyo Domes, will end up in the ocean every single year!
The first blog in our mymizu series ‘My Journey Towards Sustainability with Kanae’.
“I know this is out of the blue, but have you ever eaten plastic? Most people would answer “No”.
But what if I told you, you are eating plastic every day? In fact, you could be eating the equivalent of one credit card’s worth (5g) a week, or one hanger’s worth (21g) a month. Yes, let’s take a moment to allow that to sink in…
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