Why Are Japanese Motor Lead Times Getting Longer? Sourcing and Substitution Priorities After China Tightens Rare Earth Exports to Japan

China's Ministry of Commerce announced tighter export controls on dual-use items to Japan on January 6, 2026, and Japan's supply of heavy rare earths has tightened noticeably since then. Based on our direct discussions with customers and industry peers, certain specifications of some Japanese-brand motors now carry lead times of six months or more.

Because of these long lead times, some customers have started asking Taiwanese motor brands about availability. Some are evaluating substitutes, while others have already switched. This article looks at where China's controls on Japan stand, why Japanese motor lead times are stretching, and the latest shifts in demand for alternatives.

How Has China Tightened Rare Earth Exports to Japan?

MOFCOM Announcement No. 1 of 2026 bans exports of all dual-use items to Japanese military users, military end uses, and any other end use that could enhance Japan's military capabilities. Third-country companies that transfer relevant Chinese-origin items to Japan are also subject to penalties.

The announcement does not name rare earths specifically, but rare earth items are included in China's 2026 dual-use import and export license catalog. Starting in February 2026, China also began adding Japanese companies and organizations to its export control lists.

The impact is already showing in the data. A Nikkei analysis of Chinese customs statistics found that dysprosium and terbium exports to Japan have been at zero since January 2026. Nikkei also reported that Proterial, a major Japanese magnet maker, was still able to obtain some export licenses before November 2025, but by July 2026 could no longer obtain any.

Why Are Japanese Motor Lead Times Affected?

Dysprosium and terbium are typically added to NdFeB magnets to help them retain magnetic strength at high temperatures. These magnets are widely used in electric vehicles, industrial robots, and many types of industrial motors. When heavy rare earths become hard to obtain, magnet supply tightens, which in turn affects the production and delivery of motors that rely on high-performance magnets. Nikkei Business also reported that production of EV and industrial machinery motors in Japan is facing serious challenges.

That said, Dai-ichi Life Research Institute, based on Japan's Ministry of Finance trade statistics, found no significant change in Japan's total rare earth imports. The sharp declines were concentrated in specific heavy rare earth items. The impact is therefore focused on high-performance magnets that require heavy rare earths, and not every Japanese motor is affected to the same degree. The actual cause of a longer lead time on any specific part number should be confirmed with the supplier.

Rare Earths Are Not the Only Pressure on Japanese Supply

Japanese factory automation products are also under pressure from AI-driven demand and component shortages. Goldman Sachs noted that many factory automation products are seeing tight supply as AI and data center demand grows rapidly, and that lead times for Japanese CNC controllers have more than doubled from the usual two to three months.

In other words, there is more than one reason Japanese lead times are stretching. Rare earths mainly affect magnets and permanent magnet motors, while electronic products such as controllers are mainly affected by shortages of memory and other components.

Demand for Alternatives Is Shifting to Taiwan's Supply Chain

There is already a public example in controllers. During the Taipei International Industrial Automation Exhibition in August 2026, a Taiwanese controller maker said that memory shortages had stretched some Japanese competitors' controller lead times from about one month to more than three months. Some customers who could not wait began looking for alternatives, and the company picked up some of those orders.

Motors are seeing a similar trend. Based on our discussions with customers and industry peers, some customers facing long lead times on Japanese motors have turned to Taiwanese motor brands, either to evaluate substitutes or to switch outright. For projects that cannot afford delays, evaluating alternatives is becoming more urgent.

It is worth noting that when substitution demand concentrates on the same group of brands, their lead times may change as well.

Connection Changes During Motor Substitution

An alternative motor may not share the same lead wire configuration, connectors, encoder cables, or terminal block specifications as the original Japanese motor. When customers switch brands, the supporting cable assemblies, wire harnesses, and wiring drawings may need to be updated as well.

Another Near-Term Risk: November 10

Beyond the controls on Japan, the expanded rare earth export controls China announced on October 9, 2025 are suspended until November 10, 2026, and there has been no official word on whether the suspension will be extended. If the expanded measures are reinstated, the scope could extend to third-country products containing Chinese rare earths, and the impact would not be limited to Japan.

The Taiwan Association of Machinery Industry also said in August 2026 that longer lead times for key components would weigh on machinery orders.

Bottom Line

Since China tightened rare earth exports to Japan, lead times on some Japanese motors have stretched to six months or more, while AI-driven component shortages have also lengthened lead times for Japanese controllers and other automation products. Demand for alternatives is shifting to Taiwan's supply chain. Ordering or stocking early, requesting quotes from alternative brands, and confirming connection requirements at the same time are practical ways to reduce the risk of line stoppages and delays.

Sources

Some data in this article is drawn from publicly available industry research and has been reorganized and rewritten by SyncTronics. All rights to the original data and research findings remain with their original publishers.

SyncTronics Solutions

SyncTronics provides integrated connector, cable assembly, terminal block, and wire harness solutions through a network of qualified supply chain partners. When customers switch to alternative brands because of long lead times on Japanese motors, we help verify the new motor's lead wire specifications and connection interfaces, sample cable assemblies, evaluate alternative parts, and plan partial shipments, with samples and datasheets available for verification.

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