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DEEP RESEARCH · JS LINK/RARE-EARTH MAGNETS

JS Link: A Radical Pivot from Bio to Non-China Rare-Earth Permanent Magnets

A review of Kenji Konishi’s role, Japanese-style production, the Yesan plant, and logistics synergy with Juseong CN Air.

Published: 2026-01-08 · Rare-earth supply-chain/materials transition analysis · Naver Blog

Investment decisions are your responsibility. This material is research, not a recommendation to buy or sell.

0. Bottom line first

The key point is that former genomic-analysis company DNA Link changed its name on March 26, 2025 and effectively rebuilt its identity around rare-earth permanent magnet manufacturing. The opportunity is the non-China supply gap in a market where China controls roughly 94% of the rare-earth permanent magnet chain; the risk is that a company with seven consecutive years of losses must survive capex, ramp-up yield, and financing pressure.

SUPPLY CHAIN

94% China dependence

China’s dominance in NdFeB magnets used in EVs, wind power, and defense creates demand for non-China sources.

JAPAN TECH

Kenji Konishi and Japanese engineers

The company hired Japanese specialists to import tacit knowledge in high-performance sintered magnet production.

YESAN

1,000-ton pilot-to-mass scale

The Yesan plant’s initial capacity is presented at 1,000 tons per year, with 42SH prototype success as the first milestone.

1. Why rare-earth permanent magnets

Official fact: The source states that China vertically integrates rare-earth mining, refining, and final permanent magnet manufacturing, controlling about 94% of the global market. The U.S. IRA and EU CRMA are presented as policy drivers pushing for non-China material sourcing and differentiated subsidies.

Interpretation: JS Link’s logic is not to beat China on cost. It is to become an alternative supplier when U.S. and European customers need a non-China source, using Korean manufacturing infrastructure and Japanese technology.

Raw-material price outlookSource figureMeaning
2024 neodymium priceAbout $94,000 per tonReference point after a correction from the peak
2025 outlookAbout $112,000Reflects EV/wind demand recovery and supply constraints
2026 outlookAbout $132,000Potential pricing upside and raw-material burden

A rebound in neodymium and praseodymium prices can help inventory gains and selling prices, but it also makes stable sourcing essential. The source highlights cooperation with non-China suppliers such as Lynas Rare Earths as a key success variable.

2. Corporate transformation: from DNA Link to JS Link

Official fact: On March 26, 2025, the company changed its name from DNA Link to JS Link, Inc. As of Q3 2025, its articles of incorporation included permanent magnet and related applied-product production, sales, distribution, import/export as item 28 and rare-earth magnet recycling as item 29.

The former genomic-analysis business had reached financial limits after seven consecutive years of losses, while competition weakened growth prospects. This transition is closer to a survival pivot than optional diversification.

Official fact: In March 2025, former largest shareholder OrbitEc sold its stake to logistics company Juseong CN Air. Juseong CN Air is led by Jin-soo Park and specializes in sea and air freight forwarding, with North America logistics capabilities and potential use of LA/Long Beach port logistics centers.

Interpretation: Rare-earth magnets require a chain from raw-material imports from places such as Australia and Vietnam, to Korean processing, to U.S. and European exports. The new largest shareholder’s logistics capability is therefore closer to execution synergy than a passive financial investment.

3. Japanese technical leadership: Kenji Konishi and the engineering team

JS Link Japanese engineering team and rare-earth magnet process image

Official fact: JS Link hired rare-earth permanent magnet expert Kenji Konishi as vice president and inside director. The source describes him as a chemical engineering graduate who studied permanent magnets in graduate school and has practical experience across raw-material blending, sintering, and surface treatment.

Interpretation: The largest barrier is not buying equipment; it is the tacit knowledge of sintered magnet mass production. Because Japan, with companies such as Hitachi Metals, TDK, and Shin-Etsu Chemical, is one of the few countries outside China with advanced sintered magnet know-how, hiring Konishi is a shortcut to compress R&D and trial-and-error time.

Role of Japanese engineersProduction-floor capability, not laboratory advice
Process designGrain-boundary diffusion and fine-powder control
CommissioningJapanese equipment testing and setup
Quality certificationEV drive-motor heat grades
Yield stabilizationFrom pilot to mass production
The real test is whether Japanese manufacturing know-how can be reproduced as mass-production yield at the Yesan plant.

4. Yesan plant and Japanese-style production line

Official fact: The company purchased a plant in Yesan, Chungnam for about KRW 10B and remodeled it as a dedicated production base. Key Japanese equipment includes Hosokawa Micron jet mills and ULVAC vacuum induction melting and sintering furnaces.

Powder uniformity determines magnetic properties, and rare-earth processing requires strict oxygen isolation. High-end Japanese equipment raises upfront costs, but it creates an environment familiar to the Japanese technical team and is intended to stabilize early yield.

Official fact: The original target was pilot production around late July 2025, but utility work such as electricity and gas was delayed by about one month after equipment-specification changes. The large melting furnace arrived through Pyeongtaek Port, and commissioning was underway.

Official fact: The source treats successful production of a 42SH permanent magnet prototype as the first milestone showing commercial product capability. 42SH is described as a general high-performance heat-resistant grade used in EV drive motors. Initial Yesan capacity is cited at 1,000 tons per year.

5. Supply chain and U.S. market strategy

JS Link Yesan plant and U.S. market strategy image

To qualify as a non-China magnet, Korean final production is not enough; rare-earth oxide inputs also need non-China sourcing. That is why purchase negotiations with Lynas and the creation of multiple supply channels matter.

Official fact: JS Link established a U.S. subsidiary, JS LINK America, and remitted initial capital of $2M. The source also states that the company contracted Baker & Hostetler for U.S. government-relations activity and hired former Republican lawmakers as lobbyists.

Interpretation: This looks like an attempt to be included in U.S. supply-chain restructuring funds or manufacturing revival programs rather than simply exporting parts. Rare-earth magnets are a technology business, but also a policy, subsidy, and origin-certification business.

6. Risks and checklist

RiskContentIndicator to watch
Financial fragilityHigh dependence on CBs and paid-in capital increases after seven years of lossesFinancing terms, dilution, overhang
Scale-upPilot success and mass-production yield are different problems42SH qualification, yield, defect rate
Geopolitical two-sidednessIf U.S.-China tension eases or China-origin magnets enter through third countries, JS Link’s price disadvantage may widenOrigin rules, tariffs, customer qualification policy
Raw-material sourcingWithout non-China raw materials, the non-China magnet premium weakensFormal supply contract with Lynas or similar suppliers

Interpretation: The three core monitoring points are 1) a formal raw-material supply contract with Lynas, 2) 42SH qualification from global automakers, and 3) timing of real mass-production revenue. If these are confirmed, JS Link can become a meaningful candidate in the non-China rare-earth supply chain.

Sources

Naver original