Spark Plug

In internal combustion engines, such as engines, this device acts like a "lighter," electrically igniting the mixture of gasoline and air.

Our spark plugs were the first domestically produced in Japan, and now we hold the No. 1 market share worldwide. They play a crucial role in running an engine; without them, a car cannot run. Our unique ceramic technology enables them to withstand the harsh environment inside an engine and improves fuel efficiency. By improving fuel efficiency, we also contribute to environmental protection by reducing CO₂ emissions.