Top Five Medium Frequency Furnace Suppliers in Japan [2025]

Founded in 1968, Nippon Industrial Furnace (NIF) isn't just a supplier—it's a legacy. Walk through their Osaka headquarters, and you'll feel the weight of decades of craftsmanship: walls lined with photos of early furnaces, engineers huddled over blueprints, and a showroom where a 1970s medium frequency furnace still hums, maintained as a tribute to their roots. "We don't just build machines," says Yuki Tanaka, NIF's chief technology officer. "We build partnerships. Our clients trust us because we grow with them."

NIF's flagship product, the MF-3000 Medium Frequency Electricity Furnace , is a workhorse for metal melting. With a capacity of 1-5 tons per batch, it's a favorite in automotive parts factories and lead acid battery recycling plants. What sets it apart? Energy efficiency. "Our furnaces use 15% less electricity than industry standards," Tanaka explains, "which isn't just good for the bottom line—it's good for the planet." Clients rave about its durability too; a Tokyo-based recycling firm recently shared that their 2010 NIF furnace still operates at 90% efficiency, a testament to the brand's commitment to longevity.

Beyond furnaces, NIF has expanded into air pollution control system equipment , ensuring their machines meet Japan's strict environmental laws. "A furnace is only as good as its ability to coexist with the community," Tanaka adds. "We want our clients to feel proud of their operations, not just productive."

If NIF is the industry veteran, EcoFurnace Tech is the bright-eyed innovator. Launched in 2010 by a team of ex-Toyota engineers, this Tokyo-based startup has taken the market by storm with its "small but mighty" approach. "We saw a gap," says CEO Mei Suzuki. "Small to mid-sized recyclers needed furnaces that were affordable, easy to install, and didn't skimp on tech. So we built one."

Their star product, the Eco-Mini 500 , is a compact medium frequency furnace designed for businesses with limited space. Weighing just 2 tons and fitting through a standard factory door, it's perfect for artisanal metalworkers and local recycling co-ops. But don't let its size fool you: the Eco-Mini 500 melts up to 500kg of metal per hour and comes with a built-in metal melting furnace control panel that even first-time operators can master. "We tested it with a group of retired craftsmen last year," Suzuki laughs. "They had it running in 20 minutes flat!"

EcoFurnace's secret weapon? Customization. A lithium battery recycling plant in Hiroshima recently commissioned a modified Eco-Mini with a specialized coil for handling lithium alloys, and the result was a 30% faster melting time. "We don't believe in 'one-size-fits-all'," Suzuki says. "Every business has a unique story, and their equipment should reflect that."

For companies with global ambitions, GFS Japan is the go-to partner. Part of the multinational GFS Group, their Yokohama facility serves as the Asian hub for designing turnkey solutions—think full recycling lines that include everything from shredders to medium frequency electricity furnaces to waste treatment systems. "We don't just sell a furnace; we deliver a vision," says Takeshi Mori, GFS Japan's sales director. "A client in Vietnam wanted to build a lead acid battery recycling plant from scratch? We handled everything: layout, equipment, training. Now they're processing 200 tons of batteries monthly."

GFS's ProSeries MF Furnace is built for scale. With capacities up to 10 tons per batch and 24/7 operation capability, it's a staple in large-scale recycling plants across Southeast Asia. What clients love most is the integration with GFS's air pollution control system equipment . "Our furnaces come with a built-in dust collector and scrubber," Mori explains, "so clients don't have to juggle multiple suppliers. It's seamless, efficient, and ensures they meet even the strictest emissions standards."

But GFS isn't just about size. They're also pioneers in sustainability. Their latest model, the ProSeries Green, uses recycled steel in its construction and features a heat recovery system that repurposes excess energy to power auxiliary equipment. "We're in the business of recycling, after all," Mori smiles. "We should practice what we preach."

When SMT K.K. launched in 2015, their mission was clear: "Make green tech accessible." Based in Kyoto, a city known for blending tradition and innovation, SMT has become a darling of eco-conscious businesses. "We started with a simple question," says founder Aiko Nakamura. "Why can't industrial equipment be both high-performance and kind to the planet?"

The answer? The EcoSphere MF Furnace . This compact, energy-efficient model uses a proprietary magnetic coil design that reduces power consumption by 20% compared to competitors. "We worked with materials scientists at Kyoto University to develop it," Nakamura explains. "It's like using a smart phone instead of a flip phone—same function, but smarter." The EcoSphere is particularly popular in lithium battery recycling, where precision temperature control is critical. A Berlin-based recycler recently reported that their SMT furnace helped them recover 5% more cobalt from lithium-ion batteries, boosting profits while cutting waste.

SMT also stands out for its customer support. "We assign a dedicated sustainability advisor to every client," Nakamura says. "They help optimize operations, track carbon footprints, and even apply for green energy grants. It's not just about selling a product—it's about building a movement."

PFW Ltd. is proof that great things come in small packages. Tucked away in a quiet industrial park in Nagoya, this family-owned business has just 30 employees but a reputation that rivals industry giants. "We focus on quality over quantity," says third-generation owner Kenji Watanabe. "Every furnace is built by hand, tested for 100 hours before shipment, and signed by the engineer who made it. That's our promise."

PFW's MicroMelt MF Series is designed for niche industries: jewelry makers, aerospace part manufacturers, and specialized metal alloy producers. With capacities as low as 50kg per batch, it's not the biggest furnace on the market, but it's the most precise. "A watchmaker in Switzerland needed to melt a rare platinum-gold alloy," Watanabe recalls. "Our furnace hit the exact temperature—1,768°C—every single time. They ordered three more."

While PFW doesn't chase mass markets, they excel in customization. Clients can request everything from specialized liners to touchscreen controls, and lead times are surprisingly short (just 8 weeks, compared to 12-16 weeks for larger suppliers). "We're small, so we're agile," Watanabe says. "If a client has a unique need, we don't say 'no'—we say 'let's figure it out together.'"