History
Our History
Over Four Decades of Clean-Water Innovation
In 1983, the president of Mitsubishi Rayon fell ill from contaminated drinking water during a business trip to Mexico. The incident led to the development of a hollow fiber membrane filter for the portable water purifier “Mashimizu,” opening the door to innovative household water filtration. The following year, the countertop water purifiers “Cleansui S” and “Cleansui D” were introduced to the market, and in 1989 Cleansui Petit, the first faucet-mount purifier in the series, became a runaway bestseller, driving the growth of our product line.
2527
The Birth of the Cleansui Brand
2532
The First Faucet-Mount Purifier
2552
Thai Importer Founded
40+
Years of Water Filtration Innovation
Filtration using a system consisting of activated carbon and hollow fiber membrane filters. Our system removed organic matter in the orange juice samples. The sample thus became a clear liquid.
Launched the world's first portable water filter "Mashimizu" using hollow fiber membranes (1984)
After gaining recognition in the medical industry The hollow fiber became the focus. since then Hollow fiber membranes are used in various applications. which led to the development of water purifiers The development of hollow fiber water filters began after the drinking water poisoning incident. This was made by the former president of Mitsubishi Rayon during a business trip in Mexico. This president dreams of "Let everyone have safe drinking water everywhere without worry" after returning to Japan. The president ordered the development of portable water purifiers. In the following year, 1984, the world's first portable water purifier with hollow fiber membrane filter called "Mashimitsu" was released on the market.
1984 The water purifier brand "Cleansui" was born.
After launching the Mashimizu portable water purifier, our development team focused on developing a drinking water system for home use. The team developed and introduced "Cleansui S" and "Cleansui D" household desktop water purifiers to the market in October 1984. Then, we launched a series of products under the umbrella brand name of Cleansui. apply to different areas as well as products for use in residential and commercial facilities. They have also contributed to the world especially in healthcare and environment.
Buy Cleansui Co., Ltd. was founded on September 9, 2009, as the sole official importer and distributor of Cleansui water purifiers in Thailand. The company was later renamed Water Click Co., Ltd. on July 1, 2025.