Midori-chan was developed by the Kawada Group as a concept utilising the principles of 3R + 1. Reduce, Recycle, Reuse & Respect. ・Reduce: In Japan, Midori-chan uses 90% less water compared to other systems. ・Re-use: Watering with fresh water is an option but grey-water can also be used. ・Recycle: We utilise recycled materials for the water storage unit and the water-retention materials. -Respect: Midori-chan is designed to work like the earth and to respect the earth, naturally.