TDK

Sintered NdFeB magnets, sold as the NEOREC series, for traction motors in electrified vehicles, industrial equipment motors and wind power, together with ferrite magnets for small motors. TDK markets dysprosium-free grades and a grain boundary diffusion process it calls HAL, which it says sharply reduces heavy rare earth content compared with conventional production.

At a glance

Founded: 1935 — Established 7 December 1935 to commercialize ferrite, the magnetic material invented at the Tokyo Institute of Technology. The founding was about ferrite as a soft magnetic material; TDK dates its permanent magnet line to the FB1A ferrite magnet of 1959.
Headquarters: Chuo-ku, Tokyo, Japan
Ownership: Listed, TSE: 6762.
Revenue: JPY 2,504.8 billion group net sales
Reported, fiscal year ended 31 March 2026.
Magnet-only revenue is not broken out. The Magnetic Application Products segment reported JPY 262.9 billion, but it bundles hard disk drive heads and suspension assemblies together with magnets and is dominated by the drive components.
Source

Capacity

Each date below links to the document the figure came from. A capacity figure with no source is not on this page.

What	Figure	Status	As of
Sintered NdFeB, Narita plant, Chiba, Japan — automotive and industrial motor magnets plus prototype and development work	not disclosed by TDK	Operating	2026
Ferrite magnets, Shizuoka, Japan, including high-performance lanthanum-cobalt grades and thin magnets	not disclosed by TDK	Operating	2026
Rare-earth magnets for EV, wind power and home electronics — Guangdong TDK Rising Rare Earth High Technology Material, Meizhou, Guangdong, China, in which the TDK Group holds 63%	not disclosed by TDK	Operating	2026
Rare-earth magnet alloy production — TDK Ganzhou Rare Earth New Materials, Ganzhou, Jiangxi, China, established October 2019. This is upstream of magnet making, not finished magnets.	not disclosed by TDK	Operating	2026

Narrative

TDK was founded in 1935 to commercialize ferrite and has made magnets since the FB1A ferrite material of 1959. Magnets sit inside its Magnetic Application Products segment alongside hard disk drive heads and suspension assemblies, so magnet-only revenue is not disclosed. In the year to March 2026 that segment reported JPY 262.9 billion of net sales, up 17.6 percent, and TDK stated that magnet sales rose on automotive demand while the magnet business's operating loss narrowed on quality and cost measures. Neodymium magnets are made at Narita in Chiba and at a Guangdong joint venture at Meizhou established in 2013; ferrite magnets are made in Shizuoka. TDK acquired Showa Denko's neodymium magnet alloy research business in 2018 and set up a magnet alloy subsidiary at Ganzhou, Jiangxi in 2019.

Where public sources disagree

Magnet revenue cannot be read from the segment. Magnetic Application Products is hard disk drive heads plus suspension assemblies plus magnets, and the drive components dominate it.
TDK's own results briefing for the year to March 2026 says the magnet business was still loss-making, with the loss narrowing. That is a company statement rather than an inference, and it is unusual enough to be worth keeping in view.
Ownership of the Meizhou joint venture is stated two ways by TDK itself: the 2013 establishment release gives TDK 59%, and the current China subsidiary page gives the TDK Group 63%. No release explains the change.
A figure of 1,500 t/yr for the Meizhou joint venture appears in one 2013 third-party write-up of the launch. TDK's own release gives no capacity, and the number is now more than a decade old.
No public tonnage capacity exists for any TDK magnet plant. Figures circulating in market-report and search-optimized content are either unsourced or paywalled vendor estimates.
A 2015 Japanese trade report describes magnet production being shifted from Narita to China and Thailand. Nothing since updates that publicly, and TDK's current site lists its Thai operations as hard disk drive suspension assemblies rather than magnets.

Sources

Consolidated financial results, FY March 2026 — TDK Corporation (2026-04-28)
FY March 2026 full year performance briefing, speech text — TDK Corporation (2026-04-28)
Company profile 2022 — TDK Corporation (2022)
NEOREC neodymium magnet series product guide — TDK Corporation (accessed 2026-09-18)
Establishment of the Meizhou joint venture — TDK Corporation (2013-04-26)
TDK acquires magnet alloy research business from Showa Denko — TDK Corporation (2018-11-27)

How this page is sourced

Everything here comes from public sources — company filings, annual reports, exchange announcements, government releases and trade press. Every figure is linked to the document it came from and carries the date that document was published, because a capacity number without a date is not a fact, it is a rumor with a decimal point.

What is deliberately absent: material nonpublic information. I have spent more than two decades in this industry and a good deal of what I know about these companies I learned under NDA. Those obligations do not expire and they do not bend for a website. Nothing I have been told in confidence appears here in any form, and nothing on this page — or missing from it — should be read as a signal about what I know privately. I hold NDAs absolutely. It is the reason clients tell me things.

Judgment is the other thing left out on purpose. This page reports what has been published and who published it. Whether a target is credible, whether a ramp will hold, whether a capacity figure survives contact with the plant behind it — that is the work I do for clients, and it does not belong in a free reference page.

Where public sources disagree, I say so rather than picking a winner. Where a figure has not been published, the field says so rather than carrying an estimate. An empty field is information too.

Public filings tell you what a company has said. Whether it holds up is a different question, and the one I get hired to answer.

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