KOKUSAI SHOJI

What KOKUSAI SHOJI does

KOKUSAI SHOJI CO.,LTD. (国際商事株式会社) is a privately held Japanese precision optical manufacturer, incorporated in 1948 with roots tracing back to 1921 as Futaba Optical Manufacturing. The company designs and produces specialty optical components — principally elliptical, parabolic, and spherical reflectors, along with plane mirrors, lenses, optical filters, and xenon/mercury lamps — sold under the KSE, KSP, KSS, and KS product families. Technical differentiation centers on proprietary vacuum coating techniques that deliver wavelength-selective reflection/transmission from deep UV through infrared, with the KSE series achieving over 90% luminous flux concentration; large-format spherical mirrors up to 4.5m in diameter; and Ø5,000mm sputtering equipment housed at the Akita Factory. Supporting services include comprehensive mirror coating (aluminum, dielectric multilayer, AR, half-mirror, filters), 5-axis glass processing up to 2400x3000mm using Shibaura Machine (formerly Toshiba Machine) equipment, and water-cooled metal reflectors for high-output lighting.

The company operates three facilities: the Head Office in Nihonbashi-Kayabacho (Tokyo), the Komatsugawa Factory in Edogawa-ku (Tokyo, est. 1953), and the Akita Factory in Ogachi-gun (est. 1973), which serves as the main integrated production hub and holds ISO9001 (2014) and ISO14001 (2013) certifications. KOKUSAI SHOJI employs approximately 60 people and is led by President Yoshiyuki Yano, with no external investors, parent company, or funding rounds disclosed in the source data.

Revenue is generated almost exclusively through custom, quote-based B2B hardware sales targeting two primary segments: researchers and engineers at laboratories and R&D institutions, and industrial manufacturers of optical/lighting/UV systems. Pricing is not publicly disclosed; inquiries are handled via phone (+81-3-3666-1896) and email through the Head Office Sales Department. GTM is predominantly sales-led via direct contact, supplemented by downloadable PDF product catalogs, listing on the Metoree industrial product search service (since October 2025), and past participation in industry exhibitions such as OPIE'16. The geographic market is Japan-domestic with no global footprint claim in the available data.

Name

KOKUSAI SHOJI

Legal name

KOKUSAI SHOJI CO.,LTD.

Website

https://kokusaishoji.co.jp

Company type

Private

Founded year

1948

Operating status

Operating

Headcount range

51–100 employees

Short description

KOKUSAI SHOJI CO.,LTD. is a privately held Japanese precision optical manufacturer (founded 1948, ~60 employees) producing elliptical, parabolic, and spherical reflectors, lenses, filters, and lamps for researchers, engineers, and industrial OEMs through custom B2B sales.

Ownership category

akta.pro rank

Product category

Precision Optical Components

NAICS

Commercial, Industrial, and Institutional Electric Lighting Fixture Manufacturing (335132), Electric Lamp Bulb and Other Lighting Equipment Manufacturing (335139), Electric Lighting Equipment Manufacturing (33513)

SIC

Optical Instruments & Lenses (3827), Electric Lighting & Wiring Equipment (3640)

akta.pro primary industry

Machine Vision & Inspection Lighting (Ring lights, bar lights, backlights, strobed illumination) (IMAGAIAG)

Keywords

• Precision optical mirrors
• Elliptical reflectors
• Parabolic mirrors
• Vacuum deposition coating
• Optical lens manufacturing

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Optical Components Manufacturing and Sales: Design and manufacture of precision optical mirrors (elliptical, parabolic, spherical), lenses, filters, and lamps. Revenue generated from product sales, custom design services, and glass processing services. Large-scale manufacturing capabilities with vacuum deposition equipment up to Φ5,000mm.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

KOKUSAI SHOJI designs and manufactures precision optical components, including ellipsoidal reflectors, parabolic mirrors, spherical mirrors (up to 4.5 m diameter), plane mirrors, lenses, optical filters, and lamps. The company operates vacuum deposition and φ5,000 mm sputtering coating equipment to apply wavelength-selective coatings from deep UV to infrared, and offers custom flat mirror coating and 5-axis glass processing services as standalone offerings.

Product overview

KOKUSAI SHOJI CO.,LTD. is a precision optical mirror and lens manufacturer offering a portfolio of specialized optical components. The core product lineup centers on the KSE Series Elliptical Reflectors (for efficiently focusing lamp light), KSP Series Parabolic Mirrors (for producing collimated beams), and KSS Series Spherical Mirrors (large-format up to 4.5m diameter). Supporting these are the KS Series Plane Mirrors and Lenses for custom optical requirements. The company extends its offerings through value-added services including Flat Mirror Coating (aluminum, dielectric multilayer, AR coatings with various reflectance specifications), Glass Processing (5-axis machining for glass materials up to 3000mm), Optical Filters (UV bandpass and short/long-pass types), and specialized Water-Cooled Metal Reflectors for high-output lighting. The Akita Factory operates as a one-stop mirror production facility with vacuum deposition and sputtering equipment for producing mirrors with wavelength-specific coatings.

Differentiator

Problem solved

Functional benefit

Brands

• KSE Series: Elliptical reflectors designed for efficient light concentration from xenon lamps and super high pressure UV lamps
• KSP Series
• KSS Series
• KOKUSAI

Products and services

• KSE Series Elliptical Reflectors High-precision ellipsoidal mirrors designed to efficiently focus luminous flux from xenon short-arc lamps and super high-pressure UV lamps. The KSE series concentrates more than 90% of luminous flux from xenon lamps with no chromatic aberration and high heat stability, intended for researchers, engineers, and industrial lighting manufacturers.
• KSP Series Parabolic Mirrors Precision parabolic mirrors that convert scattered light into high-quality parallel light with high condensing efficiency, available with reflection and transmission coatings spanning deep UV to infrared range. Designed for wide aperture applications and for use by research and industrial customers.
• KSS Series Spherical Mirrors Large-size spherical mirrors available up to 4.5 m diameter, designed and manufactured to user application requirements with various coating options for different wavelength ranges. Targeted at research facilities, observatories, and industrial users requiring oversized precision optics.
• KS Series Plane Mirrors and Lenses Custom plane mirrors and lenses designed and manufactured to meet specific customer optical requirements, offered as tailored variations for particular optical system needs.
• Water-Cooled Metal Reflectors Precision water-cooled metal reflectors developed for high-output lighting applications, with compact metal reflector configurations available for specialized lighting needs requiring thermal management.
• Lamps Various lamps manufactured and sold by KOKUSAI SHOJI, including xenon lamps and super high-pressure mercury lamps intended for use with the company's elliptical reflectors in optical systems.
• Glass Processing Services Precision glass processing services using a Shibaura Machine (formerly Toshiba Machine) 5-axis machining center, with maximum processing size 2400 mm (X) × 3000 mm (Y) and Z-axis up to 700 mm. Supports counterboring, drilling, groove cutting, and thread cutting for industrial and research customers.
• Optical Filters Optical filters including bandpass filters and short-pass/long-pass filters, primarily produced for UV range applications, with maximum filter size of 500×500 mm.

Quantifiable outcome

• Over 90% luminous flux concentration achieved with KSE series ellipsoidal mirrors
• +2 more outcomes

Named customers2 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

Feature5 records

Partnerships

One partnership is on record.

• Metoree (メトリー)minorGTM or Marketing Partner · 22 October 2025KOKUSAI SHOJI products are listed on Metoree, an industrial product search service for researchers and engineers. The KSE series ellipsoidal mirrors are featured on the platform for product comparison and discovery.

Scale indicators5 records

Recent moves14 records

Expansion highlights4 records

Broad incumbents

• Thorlabs: Thorlabs is a major US-based photonics company manufacturing optical components, mirrors, lenses, and complete optomechanical systems. It is comparable to KOKUSAI SHOJI as a broad incumbent in the precision optical components space, though Thorlabs serves a much larger and more diversified customer base globally.
• Hamamatsu Photonics: Hamamatsu Photonics is a leading Japanese photonics company producing photosensors, optical sensors, and light sources. It is comparable to KOKUSAI SHOJI as a Japanese specialty photonics manufacturer with overlapping customer segments in research and industrial applications, though at substantially larger scale.
• JENOPTIK: JENOPTIK is a German technology group with a strong optics division producing precision optical components and systems. It is comparable to KOKUSAI SHOJI as a broad incumbent in industrial and scientific optics, with greater scale and broader geographic reach.
• Edmund Optics: Edmund Optics is a leading global manufacturer and supplier of optical components including precision mirrors, lenses, and filters. It is a broad incumbent competitor to KOKUSAI SHOJI, offering a much larger catalog and global distribution network, though KOKUSAI SHOJI's specialty large-format and wavelength-selective capabilities remain differentiators.
• Newport (MKS Instruments): Newport, part of MKS Instruments, is a global supplier of optical components, mirrors, and photonics subsystems. It is comparable as a broad incumbent in industrial and research optics, with significantly larger scale and a wider product portfolio than KOKUSAI SHOJI.
• SCHOTT: SCHOTT is a German specialty glass and optics manufacturer producing optical materials, coated optics, and mirror substrates. It is comparable to KOKUSAI SHOJI in optical components manufacturing and glass processing capabilities, but operates at vastly greater scale as a globally diversified materials science company.
• Coherent (II-VI): Coherent Corporation (formerly II-VI Incorporated) is a major US-based photonics and optical materials company producing laser optics, mirrors, and thin-film coatings. It is comparable to KOKUSAI SHOJI as a broad incumbent in wavelength-selective optical coatings and precision optics, but at much larger scale.

Direct peers

• CVI Laser Optics: CVI Laser Optics, now part of IDEX Corporation, manufactures precision optical components including laser mirrors, lenses, and filters with wavelength-selective coatings. It is directly comparable to KOKUSAI SHOJI in specialty coated optics for laser and UV applications, with similar focus on custom and OEM optical components.
• OptoSigma: OptoSigma Corporation is a Japanese optical components manufacturer offering mirrors, lenses, filters, and optical systems for industrial, research, and laser applications. It directly competes with KOKUSAI SHOJI in the precision optical components segment with similar product categories and customer profiles in Japan and globally.
• Sigma Koki: Sigma Koki Co., Ltd. is a Japanese manufacturer of optical components, lenses, mirrors, and prisms serving research, industrial, and laser applications. It is highly comparable to KOKUSAI SHOJI as both are mid-sized Japanese specialty optics manufacturers with catalog-based and custom offerings for scientific and industrial customers.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 KOKUSAI SHOJI