Water promises to be to the 21st century what oil was to the 20th century.

Water, as a lifeline, is facing increasingly larger issues around the world, such as drought from extreme weather, water shortages and lack of infrastructure in emerging countries, water pollution due to urbanization, and aging of water infrastructure in developed countries. How will we face our biggest challenges in the 21st century?

What if there is a water recycling system that can repeatedly reuse water used at home, like a spaceship?

What if there is a water recycling system that can repeatedly reuse water used at home, like a spaceship? Without the long planning and construction periods that took several decades, we would be able to use water without worry of drought or water shortage and purify used water without polluting the environment. The relationship between water and people, which until now individuals could do nothing about, are redefined, so that each person can face water problems. It will become a new solution to the water problems of the world.

A challenge to the greatest freedom in human history.

Furthermore, it will not only solve water problems but also lead to the greatest freedom in human history. The history of mankind is the history of water. Since its birth, we searched for water, suffered for water and lived with water. By liberating our lives from the constraints of water, everyone would be able to use water anywhere. It may lead to a lifestyle we had not thought of before. A future in which cities would be shaped differently and we would be able to live in the deep mountains, the desert, uninhabited islands, even in space.

Company Profile

Company Name: WOTA Corporation
Address: Tosei Bldg. 2F & 3F, 3-40-3,
Hongo, Bunkyo-ku, Tokyo 113-0033, JAPAN
Date founded: October 2014
CEO: Riki Kitagawa


Water freedom
for everyone, everywhere



Having studied water throughout high school, undergraduate and graduate school, Riki has extensive knowledge in multiple disciplines, from water processing technology to water and wastewater infrastructure planning. Received an award for his master thesis on the financial problem of wastewater infrastructure in the era of population shrinkage in Japan.



Graduated from Graduate School of Information Science and Technology, The University of Tokyo and Graduate School of Information Science, Tokyo Institute of Technology. Majored in computer science and studied infrastructure building technology for big data. After graduating, he worked at Hitachi as a software engineer. At WOTA, he oversees R&D



Having first developed interest in water and environmental problems as a child correspondent at the World Water Forum, Ryo majored in environmental engineering and sustainability science, cross-cutting multiple disciplines and visiting some countries. At WOTA, he oversees procurement and logistics and is responsible for negotiating with domestic and foreign manufacturers.