ROKI Co., Ltd.

ROKI Co., Ltd. is a Japanese company based on its official website in Shizuoka, Japan. Its core business is the research, development, production and sale of filtration-technology products, mainly air filters and oil filters for automobiles, motorcycles and general-purpose engines such as those used in generators and lawn mowers. The company states that its production volume of air cleaners is among the world's largest, and that its products are also used in motorsport fields such as F-1. Its product lineup includes air cleaners, intake manifolds, power steering oil tanks, carbon canisters, ATF strainers, engine oil filters and fuel filters, as well as high-performance filter masks under the MATOI name.

ROKI Co., Ltd. is a Japanese company based on its official website in Shizuoka, Japan. Its core business is the research, development, production and sale of filtration-technology products, mainly air filters and oil filters for automobiles, motorcycles and general-purpose engines such as those used in generators and lawn mowers. The company states that its production volume of air cleaners is among the world's largest, and that its products are also used in motorsport fields such as F-1. Its product lineup includes air cleaners, intake manifolds, power steering oil tanks, carbon canisters, ATF strainers, engine oil filters and fuel filters, as well as high-performance filter masks under the MATOI name.

A filtration-technology company whose air cleaner production volume is described as among the world's largest, with applications extending to motorsport such as F-1.

• Air cleaners

  A system that removes dirt and dust from the air to supply clean air to the engine, while also reducing engine noise. ROKI develops filters not only for two-wheeled and four-wheeled vehicles but also for GHP (gas heat pump) and general-purpose engines.

• Intake manifolds

  A system that introduces air into each cylinder of an automobile engine, with piping to guide air to each cylinder and a chamber to reduce intake noise; a funnel controls airflow to improve engine output.

• Power steering oil tanks

  Used to remove dirt and metal particles from power steering oil flowing at high pressure through narrow passages, with an air-entrainment prevention function and a function to keep oil at a constant amount.

• Carbon canisters

  ROKI developed a fuel-cap-integrated canister for general-purpose engines and generators where normal installation is difficult; the company says only a few companies worldwide currently manufacture this product. Canisters are clean components that prevent emission of gasoline vapor that causes air pollution.

• ATF strainers

  A strainer that draws operating oil from the oil pan of an automatic transmission (AT). ROKI develops high-efficiency, low-pressure-loss strainers applicable to limited spaces through its own filter media and structural development.

• Engine oil filters

  ROKI develops filtration systems with environmentally friendly cleaning functions for engine oil, which the company compares to blood for a human body.

• Fuel filters

  A filter that removes dirt from fuel; it is described as the product with the longest development history at the company, and is a component that prevents adverse effects on the carburetor and engine.

• High-performance filter mask 'MATOI'

  Listed under household-related products on ROKI's product page.

• MATOI TONE UP MASK

  Listed under household-related products on ROKI's product page.

• ROKI surgical mask (for medical institutions)

  Listed under household-related products on ROKI's product page.

1. 1株式会社ROKI | ROKI Co.,Ltd.｜Shizuoka JAPANroki-jp.com
2. 2製品案内 | 株式会社ROKIroki-jp.com