TDK Corporation (TYO: 6762) is one of the few electronics components manufacturers globally capable of producing both TDK rare earth magnets — specifically sintered NdFeB grades — and high-volume ferrite magnets within the same group, a dual capability that positions TDK across the full magnet performance spectrum from commodity to high-coercivity automotive and industrial grades. The company reported group revenue of ¥2.20 trillion (~$14.6 billion USD) for the fiscal year ended March 2025.
Company Overview
TDK was founded in 1935 in Tokyo to commercialise ferrite, a magnetic material developed at Tokyo Institute of Technology — making it the first company anywhere to bring ferrite to commercial production. The TDK name derives from its original Japanese name, Tokyo Denki Kagaku Kogyo. The company is listed on the Tokyo Stock Exchange (TYO: 6762) and cross-listed on the Frankfurt Stock Exchange, with a market capitalisation of approximately $24 billion as of early 2025.
The group operates across four business segments: Magnetic Application Products (which includes rare earth and ferrite magnets), Sensor Application Products, Energy Application Products (encompassing batteries and energy storage), and Other. The Magnetic Application Products segment is TDK’s heritage division and remains a core revenue contributor, serving the EV, industrial, and HDD sectors.
TDK Rare Earth Magnets — NdFeB and Ferrite Product Range
TDK rare earth magnets in the NdFeB sintered category serve demanding end-markets including EV traction motors, wind turbine generators, industrial servo motors, collaborative robotics, and hard disk drives (HDD). NdFeB sintered magnets offer energy product values (BHmax) significantly above ferrite grades, making them the only viable option for high-torque, compact motor applications in passenger EVs and next-generation industrial equipment.
TDK’s ferrite magnet production — which uses strontium or barium rather than rare earth elements — remains one of the largest operations globally by volume. For investors assessing TDK’s rare earth exposure, the distinction matters: ferrite magnets carry no NdPr, dysprosium, or terbium input cost and are not subject to China REE export controls. The two product lines serve different customers and price dynamics, though TDK’s ability to supply both gives it flexibility in motor design consultations with OEM customers.
TDK operates magnet manufacturing facilities in Japan and China, with additional production capacity across Asia. The group has expanded NdFeB capacity in line with rising EV and renewable energy demand, with automotive applications now the fastest-growing end-market by volume for sintered rare earth grades.
Key Rare Earth Inputs and Supply Chain
TDK’s NdFeB sintered magnets require neodymium and praseodymium (NdPr) as the base alloy — the primary volume input — plus dysprosium (Dy) and terbium (Tb) as heavy rare earth (HREE) additives in high-coercivity grades used in automotive traction motors and industrial applications where elevated operating temperatures require enhanced resistance to demagnetisation. Current industrial benchmark prices for these inputs are tracked at neodymium price, dysprosium price, and terbium price.
Japan developed a government-backed rare earth diversification programme following China’s 2010 export restrictions to Japan, which caused supply disruptions across the Japanese magnet and electronics industry. TDK has benefited from this framework, which includes JOGMEC (Japan Organization for Metals and Energy Security) support for upstream diversification. Lynas Rare Earths (ASX: LYC) supplies NdPr oxide to Japanese magnet producers via its Malaysian LAMP processing facility, forming part of the non-China supply chain that TDK and other Japanese manufacturers draw on.
China’s export controls on dysprosium and terbium — introduced in 2023 and tightened through 2024 and 2025 — represent a direct cost and availability risk for TDK’s high-coercivity NdFeB grades. Both Dy and Tb are produced predominantly in China from ionic clay deposits in southern provinces, with limited separation capacity outside China currently operational at commercial scale. TDK has active R&D programmes targeting reduced-HREE magnet formulations and magnet recycling as structural mitigations.
TDK Rare Earth Magnets in the Global Market
In Japan, TDK competes in the NdFeB sintered segment against Shin-Etsu Chemical (TYO: 4063) and Proterial (formerly Hitachi Metals), both of which operate NdFeB magnet production at scale. Globally, TDK rare earth magnets compete with Chinese producers including DMEGC Magnetics, Zhongke San Huan, and Ningbo Yunsheng — producers that benefit from direct access to domestic REE inputs and operate at substantially higher volumes. For a ranked assessment of the global NdFeB market, see Top 10 Rare Earth Magnet Manufacturers.
EV traction motors are driving the volume growth story for NdFeB producers. A single battery electric vehicle requires approximately 1–3 kg of NdFeB magnet material depending on motor architecture; total NdFeB demand for automotive applications is forecast to grow substantially through 2030 as global EV penetration accelerates. TDK is positioned as a tier-one supplier to Japanese and international automotive OEMs, where qualification requirements and supply chain continuity are prioritised over unit cost.
TDK’s investment in HREE substitution research — developing magnet formulations that reduce or eliminate dysprosium content without sacrificing coercivity — reflects a broader industry drive to reduce supply chain exposure to controlled Chinese outputs. Grain boundary diffusion (GBD) technology, which applies HREE to magnet surface layers rather than bulk alloy, is an established approach TDK and Japanese peers have advanced over the past decade to reduce per-unit Dy consumption.
Company Snapshot
| Founded | 1935 |
|---|---|
| Headquarters | Tokyo, Japan |
| Stock Listing | Tokyo Stock Exchange: TYO: 6762 / Frankfurt Stock Exchange |
| Key Magnet Products | NdFeB sintered rare earth magnets; ferrite magnets |
| Primary REE Inputs | Neodymium, praseodymium (NdPr); dysprosium, terbium (HREE additives) |
| Key End-Markets | EV traction motors, wind turbines, industrial servo motors, HDD, robotics |
| FY2025 Group Revenue | ¥2.20 trillion (~$14.6 billion USD) — fiscal year ended March 2025 |
| Market Capitalisation | ~$24 billion USD (early 2025) |
This article is for informational purposes only and does not constitute investment advice. Prices and financial data are subject to change without notice.
Source: TDK Corporation Investor Relations | USGS Rare Earths Statistics
What rare earth magnets does TDK Corporation produce?
TDK produces sintered NdFeB rare earth magnets and ferrite magnets. NdFeB grades are used in EV traction motors, wind turbine generators, industrial servo motors, robotics, and hard disk drives. Ferrite magnets use strontium or barium rather than rare earth elements and serve different, typically lower-performance, motor applications.
What rare earth elements does TDK use in its magnets?
TDK’s NdFeB sintered magnets require neodymium and praseodymium (NdPr) as the base alloy. High-coercivity grades for automotive and industrial applications also incorporate dysprosium (Dy) and terbium (Tb) as additives to maintain magnetic performance at elevated operating temperatures.
How does TDK source its rare earth materials?
TDK sources rare earth inputs through Japan’s trading house network and has benefited from Japan’s government-backed REE diversification programme, developed in response to China’s 2010 export restrictions. Lynas Rare Earths (ASX: LYC) is among the non-China suppliers of NdPr oxide to Japanese magnet producers, including through its Malaysian LAMP processing facility.
How does TDK compare to other rare earth magnet manufacturers?
In Japan, TDK competes with Shin-Etsu Chemical (TYO: 4063) and Proterial in the NdFeB sintered segment. Globally, Chinese producers including DMEGC Magnetics, Zhongke San Huan, and Ningbo Yunsheng operate at higher volumes with direct access to domestic REE inputs. TDK’s competitive position rests on its dual magnet capability, established OEM customer relationships, and Japanese quality standards.
What is TDK’s exposure to China rare earth export controls?
TDK’s high-coercivity NdFeB magnets require dysprosium and terbium, both of which are subject to China’s export controls introduced from 2023 and tightened through 2025. China accounts for the substantial majority of global Dy and Tb production. TDK is pursuing reduced-HREE magnet formulations and grain boundary diffusion technology to reduce per-unit consumption of these controlled materials.
