Launch of “Mashimizu,” the world’s first hollow-fiber membrane filter-based portable water purifier (1984).
After being recognized in the medical care industry, the hollow-fiber membrane became a focus of attention. Since then, hollow-fiber membranes have been used in various applications, leading to the development of a water purifier. The development of water purifiers adopting hollow-fiber membranes started after the drinking water poisoning incident, which was experienced by a previous Mitsubishi Rayon president during a business trip in Mexico. This president dreamed of “Providing everyone with safe drinking water anywhere without having anxiety.” After returning to Japan, the president ordered the development of a portable water purifier. In the following year of 1984, the world’s first hollow-fiber membrane filter portable water purifier called “Mashimizu” was put on the market.
1984 birth of our water purifier brand “Cleansui.”
After the release of the portable water purifier “Mashimizu,” our development team focused on the development of drinking water systems for use in the home. The team developed and introduced the household countertop water purifiers of “Cleansui S” and “Cleansui D” to the market in October of 1984. Then, we introduced a series of products in the umbrella brand name of Cleansui. Our technologies are currently being applied to various areas including products for use in residential and commercial facilities. They have also contributed to the world, especially in the fields of medical care and environment.