You should select Cleansui products.

There are several reasons for selecting Cleansui products over other water purifiers in the market. First, Cleansui high-performance water purifiers with innovative hollow-fiber membrane filter technology can absolutely remove the 17 and 2 substances designated by the JIS S 3201 (Testing methods for household water purifiers) and Japan Water Purifier Association, respectively. Meanwhile, they selectively retain the beneficial minerals in tap water. Then, their sophisticated yet user-friendly design is attractive. Next, the low cost-performance ratio of the faucet-mounted purifier (one cartridge) that produces purified water equivalent to 450 2-liter plastic bottles of water has been unrivaled. Finally, we have a substantial after-sales support department that effectively facilitates the periodic delivery of replacement cartridges and customer care service to guide customers on the proper and carefree use of our products.

Cleansui filter cartridges

While selectively leaving minerals intact, our filters remove the 19 unwanted substances specified by Japanese authorities.

The quality standards for tap water established by the Water Supply Act included 51 items that needs to be checked. However, the quality standards for bottled water included fewer items (i.e., 19 items). In addition, tap water can contain residual chlorine, bacteria, and other impurities. A Cleansui high-performance water purifier equipped with hollow-fiber membrane filters can effectively filter the 17 and 2 substances designated by the JIS S 3201 (Testing methods for household water purifiers) and Japan Water Purifier Association, respectively. It notably retains the useful and essential minerals inherently found in tap water.

Great cost-performance ratio and eco friendliness of Cleansui products compared to bottled water

Cleansui products have outstanding cost-performance ratio; a faucet-mounted purifier (one cartridge) can purify water equivalent to 450 2-liter plastic bottles of water. The use of tap water for drinking can reduce greenhouse gas emissions by 99.6% in five years. This is not achievable via single-use plastic bottled water products. Water purification via Cleansui products for drinking substantially reduces the burdens on both the household finances and our planet (earth).

Substantial after-sales support

Through our online store and Cleansui club, we provides substantial after-sales support such as periodic delivery of replacement cartridges and a 24 × 7 customer care service to resolve your queries. In addition, we provide services including delivery of mounting parts, on-site maintenance, online ordering of replacement cartridges, and notification of cartridge replacement time through e-mails or social media. Moreover, after-sales supports by e-mail and telephone are available. Our products have been designed for long-term use; therefore, our customers can use them without anxiety.

Sophisticated and user-friendly product design

Pitcher-type purifiers are typically stored in a refrigerator. Meanwhile, faucet-mounted water filter purifiers provide both unfiltered and filtered water via a switching mechanism. Built-in (under-sink) filtering systems facilitate a clean kitchen. Functions considering everyday usage are achieved via the sophisticated design of Cleansui water purifiers. Therefore, Cleansui water purifiers fit nicely to various lifestyles.

The F914 mixer faucet equipped with an under-sink filtering system. This was jointly developed with GROHE, Germany.

About Cleansui

About the hollow-fiber membrane

In the 1970s, a factory of Mitsubishi Rayon (now Mitsubishi Chemical) that developed fibers for filtering water and blood encountered a problem related to the opaque polypropylene fibers produced. A researcher from this company studied the fibers under a microscope and observed numerous pores on the walls of straw-like hollow fibers. The researcher improved the process, and succeeded in developing polypropylene “hollow-fiber membrane filters.” Since then, hollow-fiber membrane filters have been used in wastewater treatment and medical care. Interestingly, they were used to make the first artificial lung device in 1978.

The birth of the Cleansui.

In 1983, the incident of drinking water poisoning of the Mitsubishi Rayon president on a business trip in Mexico led to the development of hollow-fiber membrane filter a portable water purifier “Mashimizu” in which “hollow-fiber membrane filter” is mounted. This opened the door to the launch of innovative household water-purifying systems. Indeed, in the following year, the household countertop water purifiers “Cleansui S” and “Cleansui D” were introduced to the market. In 1989, Cleansui Petit that is the first faucet-mounted water purifier in our Cleansui series achieved explosive sales. This stimulated the growth and expansion of our lineup.

Award-winning designs

The aesthetic designs of the Cleansui products have attracted significant attention, and have bagged several awards in domestic (Japan) and global design competitions. The brand received “the Red Dot Award,” which is one of the largest design award in the world for three consecutive years (2018–2020). In 2018, we received the Red Dot Award in Product Design for the Cleansui Shigaraki JP100-C water purifier. This purifier was the first product from the project “Cleansui Knows Japanese Crafts,” a collaboration with skilled craftsmen who followed Japanese traditions. In the following year of 2019, we received the Red Dot Award in Brands & Communication Design for our corporate identity (CI) of “Cleansui,” which was produced by graphic designer Taku Satoh in 2009. In 2020, we received our second Red Dot Award in Product Design for the faucet-mounted water filter “Cleansui CSP901,” which was designed by product designer Fumie Shibata.