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Niterra Co.,Ltd.

Niterra Co., Ltd. manufactures and sells spark plugs and related products for internal-combustion engines and technical ceramics in Japan and internationally. Its offerings include spark plugs for aftermarket and original equipment, igniter plugs, resistor cables and covers, glow plugs and controllers, and oxygen, NOx, temperature, and knock sensors. The company also provides semiconductor packages, semiconductor manufacturing parts, medical products, fine ceramics, bearing balls, piezoelectric ceramics, industrial ceramics, cutting tools, and the Sumikaze sterilization deodorizer. It sells spark and glow plugs under the NGK brand and sensors, semiconductor packages/substrates, cutting tools, oxygen concentrators, and piezoelectric and fine ceramics under the NTK brand. Formerly known as NGK Spark Plug Co., Ltd., it changed its name to Niterra Co., Ltd. in April 2023. Founded in 1936, it is headquartered in Nagoya, Japan.

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5334.JP

Niterra Cancels Acquisition of Denso's Spark Plug Business

Niterra announced on the 2nd that it has decided to cancel its acquisition of Denso's spark plug and exhaust sensor businesses, including oxygen sensors and air-fuel ratio sensors, and to sign an agreement terminating the contract. Denso requested the cancellation, citing changes in the market environment and a review of its policy regarding the businesses in question, and Niterra accepted the request. The acquisition had been announced on September 1, 2025, and the company had continued discussions toward completing it, but it judged that prolonged negotiations would increase uncertainty over the businesses' future prospects, affect the formulation of integration plans, and reduce the benefits of the acquisition. The full-year earnings forecast for the fiscal year ending March 2027 had incorporated preparation costs for the acquisition, but the company says the impact of the cancellation on its results will be minor. As for the Medium-Term Management Plan 2030 announced in November 2025, the company plans to re-examine its business plan, including capital allocation for growth investments, and announce it at a later date.
5334.JP · Capital · Neutral Niterra's acquisition of Denso's spark plug and sensor businesses was cancelled at Denso's request, removing a planned growth investment though the company says the earnings impact is minor.
6902.JP · Capital · Neutral Denso requested cancellation of the sale of its spark plug and exhaust sensor businesses to Niterra, citing market environment changes and a policy review.
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