Niterra Co., Ltd., formerly known as NGK Spark Plug Co., Ltd., is a Japanese manufacturer of automotive components and advanced ceramics. The company changed its corporate name to Niterra in 2023, reflecting its broader focus beyond spark plugs and its ambition to expand in ceramics and other technology-related fields.
In its automotive business, Niterra develops and manufactures spark plugs, glow plugs, ignition products, sensors and other engine-management components. These products are supplied to vehicle manufacturers and the automotive aftermarket for passenger vehicles, commercial vehicles, motorcycles and other internal-combustion applications.
Niterra also operates a ceramics and technology business that produces specialized ceramic components and related products for industrial, communications, medical and semiconductor-related applications. The company serves customers internationally through operations and sales networks across Japan, the Americas, Europe and Asia. Its shares trade in Japan, while its American depositary shares are quoted on the OTC market under the symbol NGKSY.
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