About Us

Top Message

"Only One & Good Company" We want to be the only one.

KITZ Microfilter was established in April 1986 as the microfilter division of KITZ Corporation. Since then, we have developed and produced hollow fiber membranes as well as assembly, cleaning and evaluation technologies, and application technologies that can be applied to end products.
We will continue to respond to our customers' needs by pursuing reliable technology, quality, and better service.
In addition, we promise to develop and produce environmentally friendly products based on environmental conservation and compliance management.
With our corporate philosophy of "Only One & Good Company" in mind, each and every one of our employees will continue to work toward our goal of "remaining the only one" for our customers and society.

KUROIWA Futoshi, President and CEO


Head office5125 Kanazawa, Chino-shi, Nagano, 391-8566 Japan
EstablishmentApril 1, 2004
Capital90 million yen
Fiscal-year endedDecember 31
ShareholderKITZ Corporation(100%)
Employees172(as of December 2022)
ActivitiesManufacturing and sales of water purifier
Manufacturing and sales of Industrial filter
(Semiconductor・LCD, Medical and Gas and Compress air applications)
Net sales3,428 million yen
CertificationISO9001, ISO14001, ISO45001


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