Koki Company

What Koki Company does

Koki Company (株式会社 弘輝 / KOKI COMPANY LIMITED) is a privately held Japanese manufacturer of soldering materials founded in 1964 and headquartered in Adachi-ku, Tokyo. The company develops and produces solder pastes, post-fluxes, tack fluxes, flux-cored solders, and thermosetting adhesives for surface mount technology (SMT) and power electronics assembly. Its technology platform centers on proprietary flux chemistry, with notable differentiators including 2-Step Technology for ultra-low void performance, zero-residue E-Series for formic acid reduction vacuum reflow, halogen-free formulations, HR6A high-durability solder alloys, and ICT-compatible flux flow technology. Products are qualified for ultra-fine pitch printing (0201/03015 chips, 0.1 mm CSP) as well as demanding power-device packaging such as IGBT and MOSFET modules.

The company operates three manufacturing facilities (Japan, Suzhou China, and Thailand) and wholly-owned sales subsidiaries in Hungary and the United States, reaching customers across more than 60 countries via a network of regional distributors. It targets five primary end markets: automotive/in-vehicle electronics, consumer and industrial equipment, mobile and smart devices, electronic components, and power devices — with automotive electrification and EV power conversion as strategic growth pillars. Go-to-market is enterprise field sales supplemented by technical seminars, presence at major industry exhibitions (NEPCON Japan, PCIM Europe/Asia, Productronica, JISSO PROTEC, InnoElectro), and equipment-OEM co-development partnerships such as the Mycronic jet-dispenser approval. The company holds no external institutional investment, has not disclosed revenue, and maintains a headcount of 101–250 employees.

Name

Koki Company

Legal name

株式会社 弘輝

Website

https://ko-ki.co.jp

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

101–250 employees

Short description

Koki Company is a privately held Japanese manufacturer (est. 1964) of proprietary flux chemistry and solder materials — pastes, fluxes, and adhesives — for SMT and power electronics assembly, serving automotive, consumer, mobile, and power-device customers across 60+ countries.

Ownership category

akta.pro rank

Product category

Soldering Materials for Electronics Assembly

NAICS

Other Electronic Parts and Equipment Merchant Wholesalers (42369), Other Electronic Parts and Equipment Merchant Wholesalers (423690)

SIC

Wholesale-Electronic Parts & Equipment, Nec (5065)

akta.pro primary industry

Packaging Materials & Chemicals (Underfill/Mold Compound/Die Attach/Solders) (HDAHAGAM)

Keywords

• Solder paste materials
• SMT soldering fluxes
• Power electronics assembly
• Flux-cored solder
• Halogen-free solder

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices9 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Soldering Materials Sales: Koki Company manufactures and sells soldering materials including solder pastes, fluxes, tack fluxes, and thermosetting adhesives. Products are sold directly and through distributors to electronics manufacturers globally.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Koki Company manufactures and sells soldering materials for surface mount technology (SMT) and power electronics assembly, including solder pastes (fine-pitch, ICT-compatible, halogen-free, ultra-low void), post-flux, tack flux, flux-cored solders, and thermosetting adhesives. Their proprietary flux chemistry portfolio is sold globally to electronics manufacturers across automotive, consumer/industrial, mobile, electronic components, and power device segments.

Product overview

Koki Company provides innovative soldering materials for SMT (Surface Mount Technology) and power electronics applications. The product portfolio centers on solder pastes (including fine-pitch, ICT-compatible, halogen-free, low-void, and residue-crack-prevention types), flux products (post-flux, tack-flux, transfer flux), solder alloys (high-durability, high-temperature, low-cost variants), and thermosetting adhesives. The HF1200 Series represents their flagship multi-functional solder paste technology with ultra-low void and high wettability properties. The E-Series targets power device applications with formic acid reduction vacuum reflow capability. Products serve automotive, consumer/industrial equipment, mobile/smart devices, electronic components, and power device segments across 60+ countries globally.

Differentiator

Problem solved

Functional benefit

Products and services

• S3X58-HF1200 (Ultra-Low Void Multi-Functional Solder Paste) Multi-functional solder paste addressing voids, wettability, flux scattering, printability, electrical reliability, and halogen-free requirements, featuring 2-Step Technology for unprecedented low void and high wettability; for SMT manufacturers in automotive, consumer, mobile, and power segments.
• S3X70-CF110N (Residue Crack Prevention Solder Paste) Residue crack prevention solder paste for fine-pitch printing; prevents flux residue cracking under rapid temperature/humidity changes, suppresses ion migration, and supports 0402 chips and 0.4mm pitch BGA components.
• S3X58-HF960 (ICT-Compatible Halogen-Free Solder Paste) ICT-compatible halogen-free solder paste that improves flux flowability to prevent residue on solder after reflow, suppressing probe contamination during in-circuit testing and reducing measurement defects and maintenance costs.
• S3X58-CF100-2 (Residue Crack Prevention - Atmosphere Reflow Compatible) Industry-first atmosphere reflow compatible residue crack prevention solder paste with anti-crack additives; delivers high electrical reliability in condensation environments typical of automotive applications.
• S3X58-M500C-7 (High Wettability Solder Paste)

Quantifiable outcome

• Flux gas exhaust technology achieves unprecedented low void rates in power device soldering
• +2 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Eight partnerships are on record, tiered minor, regional and core.

• Suru ASminorGTM or Marketing Partner · 16 September 2025Suru AS, a grinding equipment manufacturer, featured Koki Company in a video case study at their JASIS 2025 exhibition booth, demonstrating研磨装置導入事例.
• KOKI SINGAPORE PTE LTDregionalChannel Partner/ Reseller/ Distributor · 4 September 2025KOKI SINGAPORE PTE LTD serves as an agency/distributor for Koki Company, exhibiting at SMTA EXPO & TECH FORUM 2025 in Penang, Malaysia to introduce Koki products including S3X58-HF1200 solder paste.
• Mycronic ABcoreTechnology or Integration · 30 April 2025Swedish equipment manufacturer Mycronic has approved Koki's S3X70-E160DN solder paste for use with Mycronic jet dispensers MY600 and MY700.
• Merit ElectronikregionalChannel Partner/ Reseller/ Distributor · 30 January 2023Previous authorized distributor for Turkey (succeeded by TETRATRONİK from February 2023).
• TETRATRONİK MAKİNE TİCARET LİMİTED ŞİRKETİregionalChannel Partner/ Reseller/ Distributor · 30 January 2022Authorized general distributor for Turkey, providing product introduction, technical support, and distribution services to customers in the region.
• Koki Solder America, Inc.coreOthers
• Koki Europe Sp. z o.o.coreOthers
• Koki Electronic Materials Ltd. (Suzhou)coreOthers

Scale indicators2 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• AIM Solder: Mid-sized global solder materials manufacturer with a broad SMT and power-electronics paste portfolio. Competes with Koki in halogen-free, lead-free, and high-reliability formulations for similar customer segments.
• Indium Corporation: US-headquartered specialty materials producer with a major solder paste, flux, and metal-alloys business. Directly competes with Koki in halogen-free, low-void, and high-reliability solder pastes for automotive, power-device, and aerospace applications.
• Tamura Corporation: Japanese manufacturer of electronic materials including solder pastes, fluxes, and specialty chemicals. Directly comparable to Koki in product offering and Japan-centric customer base, with broader electronic chemicals exposure.
• Harima Chemicals Group, Inc. Japan-based supplier of solder materials and electronic chemicals, including solder pastes and fluxes. Closely competes with Koki in SMT solder paste and serves overlapping automotive and consumer-electronics customers, with a broader chemicals portfolio.
• Nihon Superior Co., Ltd. Japanese manufacturer of solder pastes, fluxes, and lead-free alloys, with patented SN100C alloy technology. Comparable to Koki in size, geography, and customer focus (automotive and industrial electronics).
• Kester (MacDermid Alpha): Long-established US-based solder paste, flux, and wire supplier, now part of MacDermid Alpha. Overlaps directly with Koki in SMT solder pastes and fluxes for industrial, automotive, and consumer electronics assembly.
• Senju Metal Industry Co., Ltd. One of the world's largest solder paste and soldering materials manufacturers, headquartered in Japan. Directly comparable to Koki across product categories (solder pastes, fluxes, alloys) and target customers (automotive, consumer electronics, power devices), but at significantly larger scale.
• Alpha Assembly Solutions (MacDermid Alpha Electronics Solutions): Global solder materials supplier offering a full range of solder pastes, fluxes, and alloys. Direct competitor to Koki across SMT and power-electronics segments, with comparable focus on automotive-grade reliability.

Regional players

• Shenzhen Vital New Material Co., Ltd. China-based solder paste and electronic materials supplier serving primarily Chinese and Asian electronics manufacturers. Comparable product portfolio to Koki but with a regional rather than global sales footprint.

Broad incumbents

• Heraeus Electronics: Division of the German precious-metals and technology group Heraeus, offering solder pastes, bonding wires, and thick-film materials. Larger and more diversified than Koki, but overlaps in solder paste and electronic-materials chemistry.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@KOKISOLDER
• LinkedInlinkedin.com/company/koki-company-limited

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Koki Company