Which country does NGK spark plug belong to?

[JuliannaMarie]

NGK spark plugs are from Japan. NGK is the abbreviation of Nippon Gaishi Kaisha, a Japanese company specializing in spark plugs, automotive exhaust filters, oxygen sensors, etc. Spark plugs, commonly known as 'fire mouths,' function by discharging the high-voltage pulse electricity sent through the high-voltage wire, breaking down the air between the two electrodes of the spark plug to generate an electric spark that ignites the air-fuel mixture in the cylinder. The main types of spark plugs include: standard spark plugs, insulator projection spark plugs, electrode spark plugs, seat-type spark plugs, pole-type spark plugs, surface gap spark plugs, etc.