About Watasumi

Our company was started at the Okinawa Institute of Science and Technology from research conducted by many talented scientists working together for a common goal.

I am proud to take their hard work to the next stage through creating our products.

Our Company

Watasumi was founded by David Simpson in 2021 with the support of OIST's R&D Cluster Section and the Tech Pioneers program. Although a young company, we have already long established relationships with our technology champions and early adopters. By taking the next step and starting a company it allows us to have more impact than through just our research.

Our Vision

We want to help Small and Medium sized companies access to the kind of wastewater management options that are currently only available to big companies.

We want to build a equal hiring company in Okinawa Japan and springboard into the rapidly developing economies in the region, places that can really benefit from tough and sustainable technologies.

Our Team

Our products are made to real world specifications, field tested in... 

We want a to be known for our trustworthy performance and long term low maintenance.


We placed top 16 in the ClimateLaunchPad! Watch all the pitches from their page here.