【Report】 ”mymizu Challenge” at 6 universities in Chiyoda, Tokyo

 

From June 5 (World Environment Day) to July 4, the mymizu Challenge was held in collaboration with Chiyoda City and the Chiyoda Campus Consortium, with students from six universities in the area taking part.

🌱 Results

  • Participants: 199 students

  • Plastic bottles saved: 1,866 bottles
    → Equal to 392m in height, 60m taller than Tokyo Tower!

  • Water dispenser usage (as of July 16, 2025): 1,736 liters
    → Equivalent to 3,472 plastic bottles and 365 kg CO₂ saved
     (equal to the emissions of a gasoline car for 33 months)


    👉 Read the full report here
    Chiyoda Campus Consortium



💬 Reflections from participants

  • “This inspired me to stop buying plastic bottles and use my own bottle instead.”

  • “I now feel much closer to environmental issues.”

  • Some students saved over 100 bottles on their own!

💧 Thank you to everyone who joined the challenge!
Together, small everyday actions can create big change.

 
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