What TSD does

TSD Co., Ltd. (株式会社TSD) is a Japanese contract manufacturer founded in February 1996 in Hanamaki, Iwate Prefecture, originally as Tohoku Eiden and renamed to TSD in April 2006. The company specializes in custom wire harness manufacturing, control panel assembly, and printed circuit board (PCB) mounting for semiconductor manufacturing equipment and other precision industrial machinery. Its technical capabilities span wire gauges from AWG30 to AWG2/0, with proficiency across connector families including MIL, HARTING, JAE waterproof, WAGO push-in, and TE Dynamic series, supported by certified soldering, crimping, and pipe-fitting personnel.

The business operates a sales-led, direct-relationship model as a designated partner factory to major Japanese semiconductor equipment OEMs, primarily the Tokyo Electron group (its anchor customer since 1996, recognized with TEL's Excellent Partner Award in 2022), alongside Nikon, Yokogawa Solutions, and several precision component manufacturers. TSD employs 224 workers across four factory buildings (A棟–D棟) at its Hanamaki headquarters and operates a wholly-owned subsidiary, TM TEC, established in March 2020 in Oshu City, Iwate Prefecture. Pricing is quote-based and B2B; revenue streams are hardware sales (wire harnesses) plus professional services (control panel and PCB assembly). The company is privately held and family-controlled, with leadership succession completed in January 2022.

Name

TSD

Legal name

株式会社TSD

Website

https://tsdc.co.jp

Company type

Private

Founded year

1996

Operating status

Operating

Headcount range

51–100 employees

Short description

TSD is a Japanese contract manufacturer specializing in custom wire harnesses, control panel assembly, and PCB mounting for semiconductor manufacturing equipment OEMs and precision industrial machinery makers, operating from four factories in Iwate Prefecture.

Ownership category

akta.pro rank

Product category

Wire Harness and Control Panel Manufacturing

NAICS

Communication and Energy Wire and Cable Manufacturing (33592), Other Fabricated Wire Product Manufacturing (332618)

SIC

Electrical Industrial Apparatus (3620)

akta.pro primary industry

Cable Assemblies & Wire Harnesses (HDAHAOAB)

akta.pro secondary industry

Wiring Harnesses & Pre-Fabricated Assemblies (IMADAMAN)

Keywords

• Wire harness manufacturing
• Control panel assembly
• Printed circuit board assembly
• Semiconductor equipment components
• Industrial wire harnesses

Headquarters

HQ city

Hanamaki

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Wire Harness Manufacturing: Custom wire harness design and manufacturing for semiconductor manufacturing equipment and industrial machinery. Production is primarily manual for small-batch, high-mix applications.
2. Control Panel Assembly: Assembly of electrical control panels including wiring, connection, adjustment and inspection services for various controllers, power control panels, and temperature control panels.
3. Printed Circuit Board Assembly: PCB mounting services for electronic assemblies.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

TSD designs and manufactures custom wire harnesses, electrical control panels, and printed circuit board assemblies for industrial machinery, with a primary focus on semiconductor manufacturing equipment. The company supports a broad wire gauge range (AWG30 to AWG2/0), multiple connector families, and various termination methods (soldering, crimping), and produces harnesses from samples even without drawings. Production is performed manually in four factories plus a 100%-owned subsidiary (TM TEC), targeting small-batch, high-mix orders from major equipment manufacturers in Japan.

Product overview

TSD is a manufacturing company offering three integrated product lines: (1) Custom Wire Harness Manufacturing for industrial machinery, supporting AWG30 to AWG2/0 gauge with various connector types and termination methods; (2) Control Panel Assembly covering electrical control panel assembly, wiring, and piping; and (3) Printed Circuit Board Assembly for semiconductor manufacturing equipment. The company specializes in small-lot, high-mix production for semiconductor manufacturing and industrial machinery applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Wire Harness Manufacturing (ワイヤーハーネス) Custom wire harness design and manufacturing for industrial machinery, supporting wire gauges from AWG30 to AWG2/0 with various connector types (MIL, HARTING, JAE waterproof, WAGO, ITT Canon, TE Dynamic series), communication cables (RJ45), press-fit terminals (E-CON), and termination methods including soldering and crimping performed by certified personnel. Harnesses can be produced from physical samples even without engineering drawings, replicating identical specifications.
• Control Panel Assembly (制御盤組立) Electrical control panel assembly and wiring services, including installation of electrical components, wire harness connections, power wiring, temperature control panels, and operation/display units for industrial machinery. Also covers air piping, water-cooling piping, and fluid piping construction with certified qualifications, supporting various controllers, power control panels, and temperature control panels used in industrial equipment.
• Printed Circuit Board Assembly (プリント基板実装) Surface-mount and through-hole PCB assembly for electronic assemblies used in semiconductor manufacturing equipment and control units, provided as part of TSD's integrated electronics manufacturing capabilities alongside wire harness and control panel work.

Named customers7 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• Tokyo Electron Tohoku Co., Ltd.coreStrategic or Co-development Partner · 1 April 1996Primary customer and partner since founding. TSD serves as a cooperative factory for Tokyo Electron, manufacturing control units, PCB assemblies, and wire harnesses for semiconductor manufacturing equipment.
• TM TEC (subsidiary)coreStrategic or Co-development Partner100% TSD-owned subsidiary established in March 2020, located in Oshu City, Iwate Prefecture, to expand manufacturing capacity.

Scale indicators4 records

Recent moves11 records

Expansion highlights4 records

Direct peers

• Sanwa Denki Kogyo Co., Ltd. Japanese manufacturer of industrial wire harnesses and control panel assemblies for factory automation and machinery OEMs. Closely comparable to TSD as a domestic small/medium-sized Japanese shop doing custom harness and control panel work for industrial equipment customers.
• Junkosha Inc. Japanese specialty cable and wire harness manufacturer focused on semiconductor, medical, and industrial applications. Closely comparable to TSD in serving semiconductor manufacturing equipment OEMs with precision wire and cable assemblies in Japan.
• Dyden Corporation: Japanese manufacturer of industrial wire and cable products serving factory automation, robotics, and equipment OEMs. Comparable as a Japan-based specialty wire/cable maker serving industrial equipment customers with custom harness and cable assemblies.
• Kato Electrical Manufacturing Co., Ltd. Japanese manufacturer of control panels, wire harnesses, and electrical assemblies for industrial machinery. Comparable to TSD as a small-to-mid Japan-based subcontractor providing custom electrical assemblies and harnesses to equipment OEMs.

Broad incumbents

• TE Connectivity: Global manufacturer of connectors, sensors, and custom-engineered wire harness assemblies serving industrial equipment, semiconductor manufacturing, and automation markets. Comparable as an incumbent whose connector families (including Dynamic series cited by TSD) and industrial harness offerings overlap with TSD's product scope.
• Sumitomo Wiring Systems: One of Japan's largest wire harness manufacturers, primarily serving automotive OEMs but with industrial and equipment-grade harness capability. Comparable as a broad incumbent Japanese harness maker, though TSD operates at much smaller scale and serves semiconductor equipment rather than automotive.
• HARTING Technology Group: Global manufacturer of industrial connectors and cable assemblies, whose connector families (Han series) are explicitly supported by TSD. Relevant as an upstream technology owner whose components TSD integrates, and as a broader incumbent in industrial harness solutions.
• Furukawa Electric Co., Ltd. Major Japanese manufacturer of cables, wire harnesses, and electrical equipment serving industrial, telecommunications, and semiconductor markets. Comparable as a broad incumbent in industrial wire/cable with downstream equipment exposure similar to TSD's customer base.
• Tatsuta Electric Wire & Cable Co., Ltd. Established Japanese manufacturer of specialty wires and cables, including those used in electronics, industrial equipment, and semiconductor-related applications. Comparable as a broader incumbent in the Japan specialty wire/cable market relevant to TSD's customer base.
• Yazaki Corporation: The world's largest wire harness producer, primarily automotive but with industrial harness exposure. Relevant as a scale reference and as a comparable Japanese harness manufacturer, though TSD's niche semiconductor equipment focus and small-batch manual model contrast with Yazaki's high-volume automation.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

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 TSD