Our Business

Safety Systems Business

Nippon Kayaku has a long history in explosives/pyrotechnics R&D and manufacturing, with a wide range of technologies. By applying these technologies, we have developed original automobile airbag inflators, micro gas generators that tighten seatbelts in the event of a collision, and ignition devices called squibs that are a key component of these. We enhance safety in automobile societies by providing such products to the global market.

We have plants in five countries around the world, with plans for further global expansion.

Main Products


An inflator is a gas generator that inflates the air bag. Nippon Kayaku started with inflators for driver's seat and passenger seat applications, and later expanded our scope to add inflators for side air bags, curtain air bags, and knee air bags to our portfolio. We continue to develop new products, to enhance the safety of vehicles.

Micro Gas Generators

A micro gas generator is a device that acts to retract the seatbelt (seatbelt pretensioner) in the event of a collision.
The retraction of the seatbelt fixes the body to the ideal position in relation to the inflated airbag. This increases the effectiveness of the airbag, maximizing the safety for the passenger.
As a safety device during an accident, it has begun to be used for various purposes, such as the shifting of the headrests or seats, or a system where the front hood is popped up to protect pedestrians.


A squib is an ignition part embedded in inflators and micro gas generators.
When the sensor detects a collision, an electric current is sent to the squib, and then the heat that is generated ignites the agent inside the squib, leading to its activation. Upon activation, the ignition and heat from the squib is transferred to the gas generating agent of the inflator or micro gas generator which generates the gas used to propel the device.

Operating Mechanism of Automobile Safety Parts

  1. The Collision sensor is a device embedded in the front portion of the vehicle, which detects collisions.
  2. The Diagnostic device determines whether a collision is caused by an accident or not.
  3. When determined as an accident, an electrical signal is relayed to the squib.
  4. The squib's explosive agent is ignited by the relayed electrical signal.
  5. Gas generating agent is ignited, and gas is generated.
  6. When the "airbag" is inflated, the "seatbelt pretensioner" retracts the seatbelt, absorbing the shock received by the passenger.

*This process from 1 to 6 is completed in about 0.05 seconds.

Related group companies

Kayaku Safety Systems Europe a.s.
Manufacturing and sales of squibs and micro gas generators

Kayaku Safety Systems (Huzhou) Co., Ltd.
Manufacturing and sales of inflators and micro gas generators

Kayaku Safety Systems de Mexico, S.A. de C.V.
Manufacturing and sales of micro gas generators and squibs

Kayaku Safety Systems Malaysia Sdn. Bhd.
Manufacturing and sales of inflators, micro gas generators and squibs

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