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Based in Nagoya, Japan, NGK Spark Plug Co., Ltd., along with its subsidiaries, specializes in the production and distribution of spark plugs and related components for internal-combustion engines, in addition to advanced technical ceramic products. Its comprehensive product portfolio encompasses a variety of spark plugs, catering to both the original equipment and aftermarket sectors, alongside igniter plugs, resistor cables, and covers. The company also supplies ceramic and metal glow plugs, complete with their controllers. Furthermore, it develops and provides a suite of sensors, such as those for oxygen, NOx, temperature, and knock detection. Beyond engine components, NGK Spark Plug extends its offerings to semiconductor packaging and substrates, including integrated circuit (IC) packages crucial for electronics and smart devices, and specialized parts for semiconductor manufacturing. Additionally, it produces various medical products. A significant part of its business involves fine ceramics, encompassing durable wear-resistant components, ultrasonic transducers and sensors, essential parts for semiconductor fabrication machinery, electrical equipment components, and other bespoke ceramic items. The company's industrial tool division manufactures cutting instruments crafted from materials like ceramic, cermet, micro-grain carbide, coated carbide, and cubic boron nitride (CBN), alongside high-speed steel (HSS) and various rotational tools. Its product lines are marketed under distinct brands: NGK is reserved for spark and glow plugs, while the NTK brand covers sensors, semiconductor packages/substrates, cutting tools, and fine ceramic solutions. Established in 1936, NGK Spark Plug Co., Ltd. maintains its primary corporate office in Nagoya, Japan.
Latest quote
¥7,242
−¥204 · -2.74%
Regular session · JST · Market data may be delayed.
Based in Nagoya, Japan, NGK Spark Plug Co., Ltd., along with its subsidiaries, specializes in the production and distribution of spark plugs and related components for internal-combustion engines, in addition to advanced technical ceramic products. Its comprehensive product portfolio encompasses a variety of spark plugs, catering to both the original equipment and aftermarket sectors, alongside igniter plugs, resistor cables, and covers. The company also supplies ceramic and metal glow plugs, complete with their controllers. Furthermore, it develops and provides a suite of sensors, such as those for oxygen, NOx, temperature, and knock detection. Beyond engine components, NGK Spark Plug extends its offerings to semiconductor packaging and substrates, including integrated circuit (IC) packages crucial for electronics and smart devices, and specialized parts for semiconductor manufacturing. Additionally, it produces various medical products. A significant part of its business involves fine ceramics, encompassing durable wear-resistant components, ultrasonic transducers and sensors, essential parts for semiconductor fabrication machinery, electrical equipment components, and other bespoke ceramic items. The company's industrial tool division manufactures cutting instruments crafted from materials like ceramic, cermet, micro-grain carbide, coated carbide, and cubic boron nitride (CBN), alongside high-speed steel (HSS) and various rotational tools. Its product lines are marketed under distinct brands: NGK is reserved for spark and glow plugs, while the NTK brand covers sensors, semiconductor packages/substrates, cutting tools, and fine ceramic solutions. Established in 1936, NGK Spark Plug Co., Ltd. maintains its primary corporate office in Nagoya, Japan.
Day range
Current ¥7,242
52-week range
Current ¥7,242
Regular session · JST · Market data may be delayed.
Based in Nagoya, Japan, NGK Spark Plug Co., Ltd., along with its subsidiaries, specializes in the production and distribution of spark plugs and related components for internal-combustion engines, in addition to advanced technical ceramic products. Its comprehensive product portfolio encompasses a variety of spark plugs, catering to both the original equipment and aftermarket sectors, alongside igniter plugs, resistor cables, and covers. The company also supplies ceramic and metal glow plugs, complete with their controllers. Furthermore, it develops and provides a suite of sensors, such as those for oxygen, NOx, temperature, and knock detection. Beyond engine components, NGK Spark Plug extends its offerings to semiconductor packaging and substrates, including integrated circuit (IC) packages crucial for electronics and smart devices, and specialized parts for semiconductor manufacturing. Additionally, it produces various medical products. A significant part of its business involves fine ceramics, encompassing durable wear-resistant components, ultrasonic transducers and sensors, essential parts for semiconductor fabrication machinery, electrical equipment components, and other bespoke ceramic items. The company's industrial tool division manufactures cutting instruments crafted from materials like ceramic, cermet, micro-grain carbide, coated carbide, and cubic boron nitride (CBN), alongside high-speed steel (HSS) and various rotational tools. Its product lines are marketed under distinct brands: NGK is reserved for spark and glow plugs, while the NTK brand covers sensors, semiconductor packages/substrates, cutting tools, and fine ceramic solutions. Established in 1936, NGK Spark Plug Co., Ltd. maintains its primary corporate office in Nagoya, Japan.
Day range
Current ¥7,242
52-week range
Current ¥7,242
Profitability as a percentage of reported revenue.
Revenue
Operating income
Net income
| Metric (JPY) | FY2026 | FY2025 | FY2024 | FY2023 | FY2022 |
|---|---|---|---|---|---|
| Revenue | 731.21B JPY | 652.99B JPY | 614.49B JPY | 562.56B JPY | 491.73B JPY |
| Cost of goods sold | 450.34B JPY | 403.86B JPY | 397.45B JPY | 371.95B JPY | 341.72B JPY |
| Gross profit | 280.87B JPY | 249.14B JPY | 217.04B JPY | 190.61B JPY | 150.02B JPY |
| Research and development | 26.78B JPY | 28.14B JPY | 27.85B JPY | 27.89B JPY | 23.69B JPY |
| Selling, general, and administrative | 129.51B JPY | 90.83B JPY | 81.87B JPY | 68.3B JPY | 63.25B JPY |
| Operating expenses | 140.43B JPY | 118.97B JPY | 109.72B JPY | 96.19B JPY | 86.94B JPY |
| Interest income | 32.26B JPY | 5.81B JPY | 4.29B JPY | 1.66B JPY | 724M JPY |
| Interest expense | 4.93B JPY | 1.73B JPY | 2.59B JPY | 1.81B JPY | 1.12B JPY |
| Depreciation and amortization | 45.02B JPY | 39.69B JPY | 39.81B JPY | 39.19B JPY | 37.94B JPY |
| Operating income | 140.43B JPY | 130.16B JPY | 107.32B JPY | 94.42B JPY | 63.08B JPY |
| Net income | 112.89B JPY | 92.63B JPY | 82.65B JPY | 66.29B JPY | 60.2B JPY |
Company facts updated Sep 10, 2026.
Recent quarterly results
Recent quarterly results
| Action | Effective date | Details | Record date | Payment date |
|---|---|---|---|---|
Stock splitUpcoming | Sep 29, 2026 | 2:1 | — | — |
Effective Sep 29, 2026
2:1
Funds reporting this stock among their holdings, ordered by reported position size.
iShares Core TOPIX ETF1475.T3.29B0.11%2.92T JPY0.05%¥415.5+0.14%
iShares JPX-Nikkei 400 ETF1364.T1.01B0.17%598.51B JPY0.05%¥3,714-0.27%
Vanguard Total International Stock ETFVXUS166.41M0.03%646.2B USD0.05%$86.52-1.02%
Vanguard FTSE Developed Markets ETFVEA109.44M0.03%315B USD0.03%$72.13-0.95%
iShares Core MSCI EAFE ETFIEFA54.73M0.03%196.63B USD0.07%$98.73-0.69%
JPMorgan BetaBuilders Japan ETFBBJP32.45M0.16%19.62B USD0.19%$77.945-0.39%
Vanguard FTSE All-World ex-US ETFVEU26.51M0.03%95.9B USD0.04%$84.535-1.00%
iShares MSCI EAFE Small-Cap ETFSCZ26.38M0.20%13.23B USD0.40%$85.425-0.75%iShares Core TOPIX ETF1475.TiShares JPX-Nikkei 400 ETF1364.TVanguard Total International Stock ETFVXUSVanguard FTSE Developed Markets ETFVEAiShares Core MSCI EAFE ETFIEFAJPMorgan BetaBuilders Japan ETFBBJPVanguard FTSE All-World ex-US ETFVEUiShares MSCI EAFE Small-Cap ETFSCZAI-generated and delayed market data for informational and educational purposes only. Not investment advice.
