What Ueno does

Ueno Co., Ltd. (株式会社ウエノ) is a privately held Japanese manufacturer of noise filter coils and related electromagnetic components, founded in 1982 and headquartered in Tsuruoka, Yamagata Prefecture. The company designs and produces common mode choke coils (UC, ADR, ADM, ADR-H, ST8, TCB, MC series), normal mode choke coils (AFP series), ferrite cores for radiation countermeasures (FT series), and smoothing/boost coils for power circuits (UHP/BCS, BCW, BCH, MGB series). Its flagship proprietary product, the Ueno Coil — a square-shaped common mode choke coil developed in 2013 and produced on a world-first in-house automatic toroidal winding machine (developed 2007) — winds in approximately 5 seconds per unit versus 240 seconds manually, achieving zero layer shorts and supporting miniaturization; cumulative shipments exceed 100 million units.

The company serves electronics manufacturers across consumer appliances (rice cookers, air conditioners, TVs, LED lighting, AC adapters) and adjacent applications such as computers and automotive electronics, addressing EMI/EMC compliance and noise suppression requirements. Ueno monetizes through direct B2B hardware sales, complemented by free EMI testing support, free sample coils (up to 5 per inquiry), and anechoic chamber lending to embed its engineering services into customer qualification cycles. Manufacturing is vertically integrated across three domestic sites in Tsuruoka (headquarters, Mikawa automated factory, Fujishima hand-wound factory) and wholly-owned production subsidiaries in Dongguan, China (2004) and Bangkok, Thailand (2014). Since 2016, the company has operated under a capital and business partnership with 双信電機株式会社 (Soshingdenki Co., Ltd.), a Tokyo Stock Exchange First Section listed entity, while retaining operational independence under founder/CEO Ryuichi Ueno (上野隆一). FY2025/5 consolidated revenue is approximately 3.3 billion JPY (≈USD 22M) with 79 employees as of May 2026.

Name

Ueno

Legal name

株式会社ウエノ

Website

https://uenokk.co.jp

Company type

Private

Founded year

1982

Operating status

Operating

Headcount range

51–100 employees

Short description

Ueno Co., Ltd. is a Japanese manufacturer of noise filter coils and electromagnetic components, founded in 1982, serving electronics OEMs across consumer appliances, automotive, and power-conversion applications with proprietary Ueno Coil technology and in-house automated winding.

Ownership category

akta.pro rank

Product category

Electronic Components (Noise Filter Coils)

NAICS

Electrical Equipment Manufacturing (33531), Other Electrical Equipment and Component Manufacturing (3359)

SIC

Electronic Coils, Transformers & Other Inductors (3677), Electronic Components & Accessories (3670)

akta.pro primary industry

Inductors & Coils (Power/RF/Chokes) (HDAHANAC)

akta.pro secondary industries

EMI/RFI Suppression Components (Ferrite Beads/Cores/Filters) (HDAHANAE), EMI/EMC & Filtering Components (Common-mode chokes, filters, shielding materials) (IMAGAJAN)

Keywords

• Noise filter coils
• Common mode chokes
• Electromagnetic interference
• Ferrite cores
• Power inductors

Headquarters

HQ city

Miwa

HQ country

Japan

HQ region

Asia

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain

Revenue model

1. Noise Filter Coil Manufacturing: Design, development, and manufacturing of noise filter coils and related electronic components. Products include common mode choke coils (AC/DC), normal mode choke coils, ferrite cores for radiation countermeasures, and smoothing/boost coils for power circuits. Revenue is generated through product sales to electronics manufacturers.

Go-to-market motion3 records

Distribution channels3 records

Marketing channels7 records

Core offering

Ueno designs, develops, and manufactures noise filter coils and related electronic components used to suppress electromagnetic interference (EMI) in electronic devices. The product lineup includes common mode choke coils, normal mode choke coils, ferrite cores for radiation countermeasures, and smoothing/boost coils for power circuits, with the proprietary Ueno Coil as the flagship offering. These components are sold to electronics manufacturers for integration into consumer electronics, household appliances, automotive electronics, and power supplies.

Product overview

Ueno Co., Ltd. is a manufacturer of noise filter coils and related electronic components. The product portfolio centers on common mode choke coils (UC, ADR, ADM, ADR-H, ST8, TCB, MC series), normal mode choke coils (AFP series), ferrite cores for radiation countermeasures (FT series), and smoothing/boost coils for power circuits (UHP/BCS, BCW, BCH, MGB series). The flagship product is the proprietary Ueno Coil (ウエノコイル), a revolutionary square-shaped coil developed in 2013 featuring automatic high-speed winding technology (5 seconds per unit) that achieves superior noise suppression. Products are used in applications including rice cookers, air conditioners, computers, automobiles, and AC adapters.

Differentiator

Problem solved

Functional benefit

Products and services

• Ueno Coil (ウエノコイル) Proprietary square-shaped common mode choke coil featuring ultra-high-speed automatic winding (5 seconds per unit vs. 240 seconds manual), zero layer shorts through edgewise winding technique, and superior noise suppression across wide frequency ranges. Sold to electronics manufacturers for EMI suppression applications.
• UC Series (Common Mode Choke Coil) Auto-wound common mode choke coils using ferrite cores. Features the world's smallest coil design with superior layer short resistance compared to hand-wound alternatives.
• UC18 and UC22 Series (New Common Mode Choke Coil Series) New additions to the Ueno Coil product line offering significant size reduction and higher inductance compared to prior UC models. Auto-wound common mode choke coils.
• ADR Series (Common Mode Choke Coil) Traditional toroidal line filter common mode choke coils with a wide range of size options. Partially supports automatic winding.
• ADM Series (Common Mode Choke Coil) Hand-wound common mode choke coils using nano crystal cores, offering high inductance and excellent magnetic saturation performance.
• ADR-H/ST8/TCB Series (Common Mode Choke Coil) Hand-wound common mode choke coils designed for high-frequency noise applications using ferrite cores.
• MC Series (Surface Mount Common Mode Choke Coil) Surface mount type common mode choke coils using ferrite cores for PCB-mounted applications.
• AFP Series (Normal Mode Choke Coil) Hand-wound normal mode choke coils using Fe-powder cores for low-cost noise absorption applications.
• FT Series (Ferrite Core for Radiation Countermeasures) Standalone ferrite cores for radiation countermeasures, offering excellent frequency characteristics and cost-effective radiation noise absorption.
• UHP/BCS Series (Smoothing/Boost Coil) Smoothing and boost coils for power circuits using Fe-Si-Al cores, featuring core loss of 300 mW/cm3 at 1000Gs/50kHz.
• BCW Series (Smoothing/Boost Coil) Smoothing and boost coils for power circuits using Fe-Si cores with core loss of 750 mW/cm3.
• BCH Series (Smoothing/Boost Coil) Smoothing and boost coils for power circuits using Fe-Ni cores, offering 400 mW/cm3 core loss and excellent DC bias characteristics.
• MGB Series (Smoothing/Boost Coil) Smoothing and boost coils for power circuits using Fe-powder cores, featuring the lowest price point in the lineup with 2000 mW/cm3 core loss.
• Ueno QC Coil A resource-saving noise filter coil product designed for cost reduction in customer applications.

Quantifiable outcome

• Ueno Coil winding speed of 5 seconds per unit vs 240 seconds for manual winding (1/50 time)
• +4 more outcomes

Named customers1 record

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators6 records

Recent moves15 records

Expansion highlights6 records

Direct peers

• Bourns, Inc. US-based manufacturer of electronic components including magnetics (inductors, chokes, transformers) and circuit protection. Comparable as a mid-sized specialist selling EMI/EMC and power magnetics into automotive, industrial, and consumer electronics.
• Sumida Corporation: Japanese manufacturer of inductors, coils, transformers, and power magnetics for automotive and consumer electronics. Closely comparable in product category (inductors and chokes), customer base (electronics OEMs), and geography (Japan-headquartered with global manufacturing).
• Laird Performance Materials: Specialist in EMI shielding materials, magnetic shielding, and thermal management solutions. Directly comparable as a niche-focused provider of EMI/EMC suppression components for electronics manufacturers across similar end markets.
• Würth Elektronik: German manufacturer of electronic components including a broad line of inductors, chokes, ferrites, and EMC/EMI components. Directly comparable product portfolio (common mode chokes, ferrites for EMI suppression) and similar B2B sales motion targeting electronics engineers.
• Coilcraft: US-headquartered specialist in RF, power, and signal magnetics including common mode chokes and EMI suppression inductors. Direct comparable as a niche-focused inductor manufacturer serving similar electronics OEM customers with custom and standard coil solutions.

Broad incumbents

• Panasonic Industry (Panasonic Holdings): Major Japanese electronics conglomerate with a passive components division offering inductors, chokes, and EMI suppression products. Overlaps with Ueno's product space but competes as part of a much larger industrial portfolio.
• Murata Manufacturing Co., Ltd. World's largest passive electronic component maker including chip inductors, common mode chokes, and EMI filters. Competes broadly in noise suppression but at significantly larger scale and across many more product categories.
• Taiyo Yuden Co., Ltd. Japanese passive component manufacturer with strong inductor and ferrite product lines serving automotive, consumer electronics, and industrial customers. Overlaps with Ueno in EMI suppression inductors but with much broader scale and portfolio.
• Vishay Intertechnology: Large global manufacturer of discrete semiconductors and passive components including inductors and magnetics. Competes with Ueno in EMI/power magnetics but as one small segment within an extensive portfolio.
• TDK Corporation: Major Japanese passive components manufacturer with significant inductor and EMC product lines. Competes with Ueno in common mode chokes and EMI suppression but as part of a vastly broader portfolio (capacitors, sensors, batteries, magnetic materials).

Market position

Strengths1 record

Weaknesses1 record

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ueno