Businesses, Core and Proprietary Technologies
ROKI TECHNO was founded in 1978 as a company specializing in the manufacturing of high-precision, industrial filters.
We have ever since been undertaking the development and production of filters, filter housing, and ozone systems as a Group company and supporting the growth of industry as a whole.



We work to create products that lead to customer satisfaction with the "Filtration Business" and "System Solutions Business"as the pillars of our company.
Filtration Business
We develop, manufacture and sell filter products and housing products used in manufacturing processes in each field.
- Electronics
Market -
- Ceramic Capacitors
- Flat panel Displays
- Secondary Batteries
- Recording Media
- Other Electronics
- Fine Chemicals
Market -
- High-Purity Chemicals for Electronics
- Photosensitive Materials such as Photoresist
- Functional Inks
- Polishing Slurry
- Other Fine Chemicals
- Chemicals
Market -
- Inorganic Chemicals
- Organic Chemicals
- Plastic Raw Materials
- Other Chemicals
- General
Industry Market -
- Household Products such as Cosmetics
- Detergents
- Eyeglass Lenses
- Paint/Ink
- Lubricants
- Other General Industrial Products
- Food and Beverages
Market -
- Alcoholic Beverages
- Soft Drinks
- Starch Sugar
- Seasoning
- Other Food/Beverage
- Pharmaceutical
Market -
- Active pharmaceutical ingredients
- Injections
- Eye drops
- Transfusions
- Vaccines
- Diagnostic pharmaceuticals
System Solutions Business
We develop, manufacture and sell ozone devices and water treatment systems used in manufacturing processes in each field.
- Electronics
Market -
- Cleaning of LCD Panel
- Cleaning of Wafer
- Metal Oxide Film Formation
- General
Industry Market -
- Film Surface Modification
- Bleaching of Fiber
- Food and Beverage/
Pharmaceutical
Market -
- Sterilization of Manufacturing Water
- Cleaning and Sterilization of Filled Containers
- Chamber Sterilization
- Sterilization of Foodstuff
- Water Treatment/
Environment
Market -
- Sterilization of various Cooling Water
- Rain Water Reuse
- Deodorant and Bleaching of Industrial Waste Water
- Sludge Reduction
- VOC Removal
- NOX Removal
Our core and proprietary technologies for filters
Liquid filtration is generally based on technology of separating solids from liquids. We have been refining this technology to such extent that enables us to remove all unwanted particles and contaminants, which are larger in size, while allowing the smaller pigments and desired components to pass through the filter. This is called classification that constitutes our core technology. Our classification technology has been adopted and used by our customers worldwide as an essential technology for the production of indispensable everyday products.
Note: In May 2006, ROKI TECHNO was selected by the Ministry of Economy, Trade, and Industry of Japan as one of the most outstanding 300 SME’s due to this technology innovation.
Our core and proprietary technologies for ozone systems
In semiconductor manufacturing process, the presence of traces of metal ions in cleaning solutions can cause problems and defects.
ROKI TECHNO’s innovative design of placing double quartz tube system in the discharge unit of our ozone generators enables us to produce a cleaner ozone gas without these metallic contaminants. This pioneering technology has been acknowledged and recognized by the semiconductor industry.