Japan's EV Battery Upcycling Push: Turning Dead Batteries Into Gold

Japan's Push for EV Battery Circularity

Japanese firms are advancing methods to recover valuable materials from spent electric vehicle batteries. An NHK WORLD-JAPAN report from July 15, 2026, highlights these developments in the context of growing global demand for lithium-ion batteries.

The focus remains on efficient extraction of rare metals while lowering environmental impact. This aligns with broader efforts in corporate Japan to build a circular economy for batteries.

Breakthroughs in Hydrometallurgical Recovery

JX Metals Circular Solutions in Fukui Prefecture has reported achieving 90 percent lithium recovery from used EV batteries through an improved hydrometallurgical process. Earlier recovery rates stood near 50 percent, and the updated method also cuts carbon emissions by 40 percent.

This progress demonstrates how targeted process refinements can increase material yields without requiring entirely new infrastructure. The approach supports Japan's semiconductor and materials supply chains by securing domestic sources of critical minerals.

JX Metals Circular Solutions operates a pilot facility in Fukui Prefecture that processes black mass derived from shredded nickel-manganese-cobalt and lithium-iron-phosphate battery packs. The hydrometallurgical sequence begins with sulfuric acid leaching at controlled temperatures, followed by sequential solvent extraction stages using organophosphorus reagents to isolate nickel, cobalt, and lithium into separate high-purity sulfate streams. Subsequent precipitation and crystallization steps yield battery-grade precursors with recovery rates exceeding 95 percent for nickel and cobalt and 85 percent for lithium.

The 40 percent emissions reduction stems from substituting imported spodumene concentrate and laterite ores with domestically recovered metals, eliminating energy-intensive mining and long-haul shipping. Life-cycle assessments conducted by JX Metals show that each tonne of recovered nickel avoids approximately 12 tonnes of CO2-equivalent compared with conventional supply chains from Indonesia and Australia.

Global benchmarks from facilities in Belgium and Canada currently achieve lithium recovery between 50 and 70 percent; JX’s Fukui process therefore narrows Japan’s technological gap. Because Japan imports virtually all of its lithium, scaling this route could cut annual import dependence by 15 to 20 percent by 2035, strengthening resource security under the Ministry of Economy, Trade and Industry’s critical minerals strategy.

New Recycling Facilities in Ehime Prefecture

Sumitomo Metal Mining has completed construction of two dedicated recycling plants in Ehime Prefecture. The Toyo Smelter and Niihama Nickel Refinery are designed to process used lithium-ion batteries and recover copper, nickel, cobalt, and lithium.

Work finished in June 2026. The company has also established a closed-loop nickel recycling partnership with Panasonic Energy, returning recovered nickel directly into new battery production.

These facilities illustrate how Japanese smelting expertise is being adapted for battery end-of-life management.

Sumitomo Metal Mining’s Toyo Smelter in Ehime Prefecture and the adjacent Niihama Nickel Refinery now accept black mass from end-of-life EV packs collected through a closed-loop agreement with Panasonic Energy. Nickel sulfate produced at Niihama is returned directly to Panasonic’s battery plants in Osaka, completing a battery-to-battery cycle that avoids primary nickel matte imports from the Philippines.

JERA has announced plans to commission a 90 percent recovery demonstration line at its Yokohama research center by 2026, targeting mixed cathode chemistries. Collection logistics rely on certified dismantlers coordinated by the Japan Automobile Recycling Promotion Center, which aggregates black mass at regional hubs before rail shipment to Ehime.

Additional entrants include Dowa Holdings and Mitsui Mining & Smelting, both constructing black-mass preprocessing plants in western Japan to secure feedstock volumes projected to reach 80,000 tonnes annually by 2030.

Government Funding and Policy Targets

The NEDO Green Innovation Fund, totaling 2 trillion yen, sets specific recovery goals for lithium-ion batteries: 70 percent for lithium and 95 percent for both nickel and cobalt. The targets require that recovery costs remain competitive with virgin material prices.

METI continues to promote 3R policies—reduce, reuse, recycle—to accelerate the battery circular economy. These measures connect directly to Japan's Green Transformation (GX) strategy and efforts to strengthen supply chain resilience.

The NEDO Green Innovation Fund has allocated 2 trillion yen through 2030, with 180 billion yen earmarked for battery recycling consortia. Recovery mandates require 70 percent lithium and 95 percent nickel-cobalt yields while achieving cost parity with virgin materials by 2028. METI’s 3R policies, reinforced by the Act on Recycling of End-of-Life Automobiles, obligate manufacturers to finance collection and mandate material traceability via digital battery passports.

Japan’s Green Transformation strategy links these targets to a 46 percent greenhouse-gas reduction by 2030, positioning domestic recycling as a strategic lever. In contrast to the EU’s Battery Regulation mandating 70 percent recycled content by 2035, Japan emphasizes voluntary industry targets backed by public funding rather than strict quotas, allowing faster pilot deployment but requiring rigorous third-party verification.

Support for Domestic Battery Manufacturing

Japan has provided Toyota with subsidies of up to $841 million to expand domestic EV battery production capacity. This funding complements recycling initiatives by ensuring that recovered materials can feed back into new cell manufacturing within the country.

Automakers including Toyota and Nissan are simultaneously developing battery lifecycle management systems that track performance from first use through potential second-life applications and eventual recycling.

Second-Life Uses Before Final Recycling

EV batteries that no longer meet automotive performance standards are being evaluated for stationary energy storage roles. This intermediate step extends the useful life of battery packs and defers the need for immediate material recovery.

Japanese automakers are piloting second-life battery deployments in stationary storage. Toyota’s 2024 demonstration in Aichi Prefecture pairs 500 repurposed Prius Prime modules with a 5 MW grid-stabilization unit operated by Chubu Electric Power, providing frequency regulation during peak solar hours.

Nissan’s partnership with 4R Energy in Kanagawa focuses on commercial building backup systems, where 10 kWh modules from Leaf vehicles deliver 70 percent of original capacity after seven years. Performance tracking relies on onboard battery management system data uploaded to a centralized platform that predicts remaining useful life within 5 percent accuracy.

Safety protocols include ultrasonic weld inspection and thermal-runaway suppression sleeves mandated by the Japan Fire and Disaster Management Agency. Economic analyses indicate second-life systems yield 30 to 40 percent higher net present value than immediate hydrometallurgical recycling when electricity arbitrage margins exceed 12 yen per kWh, yet direct recycling becomes preferable once cell degradation surpasses 40 percent.

Japanese automakers are exploring these second-life pathways as part of integrated lifecycle strategies that combine reuse with eventual high-efficiency recycling.

Global Patent Landscape and Industry Outlook

China accounted for 63 percent of international patent families related to battery circularity in 2023. Asian companies overall continue to drive innovation in this field. Japan's recycling sector is projected to grow into a multi-billion dollar industry by 2030 as collection volumes increase and recovery technologies mature.

While timelines for full commercial scale remain subject to collection infrastructure development, the combination of process improvements, new facilities, and policy support positions Japan to capture a meaningful share of the emerging battery materials market.

By Kenji Tanaka, Staff Writer