Koa Glass
Koa Glass is a privately held Japanese manufacturer (founded 1943) of cosmetics glass containers — fragrance, essence, lotion, cream, nail, and diffuser bottles — serving global cosmetics brands through integrated design-to-shipping production in Japan and China, with proprietary Million Guard antibacterial glass technology licensed into appliances and building materials.
- Company typePrivate
- Founded1943
- HeadquartersEdogawa, Japan
- Headcount251–500
- GTM typeB2B
- OfferingHardware or Manufacturing
What Koa Glass does
Koa Glass Co., Ltd. (興亜硝子株式会社) is a privately held Japanese glass container manufacturer founded in 1943, headquartered in Edogawa-ku, Tokyo, with principal production at the Ichikawa Factory (Chiba, opened 1967). The company designs, manufactures, and sells glass containers for the cosmetics industry across six product lines: fragrance (7.5–100 ml), essence/emulsion, lotion, cream, nail polish, and diffuser bottles, complemented by screen printing, hot stamping, and pad printing decoration services performed at subsidiary Koa A.C.L. (founded 1976, ~150,000 bottles/day capacity, 80 staff). Glass molds are produced and repaired at Wako Seiki (founded 1949, 15 staff). Total headcount is approximately 325 employees across the three wholly-owned subsidiaries.
The company's core technology is a vertically integrated specialty glass platform with a proprietary silver-ion soluble-glass antibacterial agent branded Million Guard, available in tablet, powder (1–10 μm), and masterbatch forms and used in home appliances, bathroom/kitchen products, and building materials. Million Guard holds EPA registration in the US (3 powder products), BPR Article 95 listing in the EU, and SIAA safety compliance in Japan; documented efficacy values include antibacterial activity 4.0 against S. aureus, 3.2 against MRSA, and antiviral activity 2.94 against H3N2 and 2.30 against Feline Calici virus. The company is ISO 9001 and ISO 14001 certified, a UN Global Compact participant since April 2022, and has received two consecutive EcoVadis Silver Medals (2024, 2025) plus FWN Living Wage certification (2024).
Commercially, Koa Glass operates a sales-led B2B model selling directly to cosmetics brand manufacturers, with a named Tier-1 customer relationship with Shiseido (2008 Excellent Supplier Award in environmental response). International operations extend to Shanghai KOA GLASS Trading and Shanghai WAKO CHEMICAL (manufacturing and distribution in China) and a European warehouse in Waardenburg, Netherlands, for European customer responsiveness. Pricing is quote-based and not publicly disclosed. In June 2026 the company publicly disclosed a cyber attack incident, indicating ongoing operational and IT resilience considerations.
Koa Glass firmographics
Firmographics- Name
- Koa Glass
- Legal name
- 興亜硝子株式会社
- Website
- https://koaglass.co.jp
- Company type
- Private
- Founded year
- 1943
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- Koa Glass is a privately held Japanese manufacturer (founded 1943) of cosmetics glass containers — fragrance, essence, lotion, cream, nail, and diffuser bottles — serving global cosmetics brands through integrated design-to-shipping production in Japan and China, with proprietary Million Guard antibacterial glass technology licensed into appliances and building materials.
- Ownership category
- akta.pro rank
Koa Glass industry classification
Industry- Product category
- Cosmetic Glass Containers
- NAICS
- Glass Container Manufacturing (327213), Other Pressed and Blown Glass and Glassware Manufacturing (327212)
- SIC
- Glass Containers (3221), Glass & Glassware, Pressed Or Blown (3220)
- akta.pro primary industry
- Cosmetics & Perfumery Glass Packaging (Fragrance Bottles, Cosmetic Jars) (IMALAEAC)
- akta.pro secondary industry
- Specialty & Decorative Glass Packaging (Custom Shapes, Embossed, Premium) (IMALAEAE)
Keywords
Where Koa Glass is headquartered
LocationHeadquarters
- HQ city
- Edogawa
- HQ country
- Japan
- HQ region
- Asia
Offices5 records
Markets served
Koa Glass business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- Glass Container Manufacturing: Design, manufacturing, and sale of glass containers primarily for cosmetics industry. Includes printing, coating, and finishing services. Products range from fragrance bottles to cream jars, essence containers, and nail polish bottles.
- Antibacterial Agent Sales (Million Guard): Sale of glass-based antibacterial agents (Million Guard) in tablet, powder, and masterbatch forms. Applied in washing machines, humidifiers, air conditioners, bathtubs, kitchen surfaces, toothbrushes, and other consumer products.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels1 record
Koa Glass product offering
Product offeringCore offering
Koa Glass designs, manufactures, and sells glass containers primarily for the cosmetics industry, covering fragrance bottles, essence containers, lotion bottles, cream jars, nail polish bottles, and diffuser bottles. The company also produces and sells its proprietary Million Guard glass-based antibacterial agent in tablet, powder, and masterbatch forms for use in home appliances, bathroom products, kitchen items, and building materials.
Product overview
Koa Glass Co., Ltd. (興亜硝子株式会社) is a glass container manufacturer specializing in cosmetics packaging with over 80 years of experience since its founding in 1943. The company operates as a single unified manufacturing platform producing glass containers across six product lines—Fragrance, Essence, Lotion, Cream, Nail, and Diffuser—supplemented by its proprietary Million Guard antibacterial agent line available in tablet, powder, and masterbatch forms. The core glass container business is supported by three subsidiary operations: Ichikawa Factory (glass manufacturing, painting, and inspection), Koa A.C.L. (printing and decoration services), and Wako Seiki (mold manufacturing and repair).
Differentiator
Problem solved
Functional benefit
Brands
- ミリオンガード (Million Guard): High-performance glass-based antibacterial agent developed by Koa Glass, containing silver ions for antimicrobial properties used in household appliances, electronics, and building materials
Products and services
- Cosmetics Glass Containers - Fragrance Line Glass bottles designed for fragrance and perfume products, available in round, square, and oval shapes ranging from 7.5ml to 100ml. Product series include KS-F CONE, KS-F KAMILLE, KF-F GEORGE, and KF-F SQUARE with various decorative variants. Sold to cosmetics manufacturers.
- Cosmetics Glass Containers - Essence Line Glass containers designed for essence, serum, and emulsion products, featuring various shapes and sizes from 10ml to 180ml. Includes KS-P, KS-ES, and KS-S Dropper series. Sold to cosmetics manufacturers for skincare lines.
- Cosmetics Glass Containers - Lotion Line Glass containers for lotions and emulsions, available in round and oval shapes with capacities ranging from 30ml to 180ml. Includes KS-J, KS-L, and KS-A series. Sold to cosmetics manufacturers.
- Cosmetics Glass Containers - Cream Line Glass jars for cream and skincare products, featuring various sizes from 3ml to 115ml. Includes KS-C, KS-PC, KS-MP, and KG-C series with various closure options. Sold to cosmetics manufacturers for skincare lines.
- Cosmetics Glass Containers - Nail Line Glass containers specifically designed for nail polish and enamel products, ranging from 2ml to 15ml capacities. Includes KS-N, KS-M, and KS-H series with various cap options. Sold to cosmetics manufacturers.
- Cosmetics Glass Containers - Diffuser Line Glass containers designed for room fragrance and reed diffuser applications, available in round and square shapes with capacities from 120ml to 200ml. Sold to fragrance and home goods manufacturers.
- Million Guard Antibacterial Agent - Tablet Type Glass-based antibacterial tablet that slowly dissolves in water, releasing silver ions to create antibacterial water. Designed to completely dissolve over 1-10 years. Standard size 10mm x 10mm x 4mm, approximately 0.7g per tablet. Used in washing machines, humidifiers, air conditioners, bathtubs, and water tanks.
- Million Guard Antibacterial Agent - Powder Type Antibacterial glass powder with average particle diameters of 1μm, 3μm, and 10μm. Used in films, fibers, and resin applications. Added at 0.3-0.5% to thermosetting resins or paints for antibacterial effect. EPA registered in the US.
- Million Guard Antibacterial Agent - Masterbatch Antibacterial masterbatch for incorporation into PE, PP, PS, ABS, PC, and TPE resins. Added at 3-5% to base resin for antibacterial effect while maintaining transparency. Used in toothbrushes, kitchen products, and various molded consumer goods.
Quantifiable outcome
- Antibacterial activity value of 4.0 against S.aureus (vs 2.0 threshold for effectiveness)
- +4 more outcomes
Companies that use Koa Glass
Customer profileNamed customers2 records
Segments6 records
Ideal customer profiles2 records
Koa Glass technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Koa Glass partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- SIAA (抗菌製品技術協議会)supportingKoa Glass participates in the Silver Association of Japan (SIAA) and conducts safety tests according to SIAA standards for their Million Guard antibacterial agents, including mutation toxicity, oral toxicity, primary skin irritation, and skin sensitivity tests.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
Koa Glass competitors and assessment
Company assessmentBroad incumbents
- SGD Pharma: French pharmaceutical and cosmetics glass packaging producer. Overlaps with Koa Glass on cosmetic glass containers while being a larger, broader-play incumbent also serving pharma vials.
- AGC Inc. (Asahi Glass): Major Japanese glass and chemicals producer with global operations. While primarily flat/automotive/display glass, AGC represents the broader Japanese incumbent landscape Koa Glass operates in and could supply cosmetic/pharmaceutical specialty glass containers as well.
- Gerresheimer: German-listed broad glass and plastics packaging manufacturer serving pharma, cosmetics, and consumer health. Overlaps with Koa Glass on cosmetic glass containers but operates at much larger scale across multiple end markets and geographies.
- Nippon Sheet Glass: Japanese-headquartered glass manufacturer with a much broader portfolio (architectural, automotive, technical glass). Useful broader-incumbent comparator for Japanese glass manufacturing scale and capabilities, though not a direct cosmetics packaging peer.
Emerging players
- Piramal Glass: Indian glass container manufacturer serving cosmetics, perfumery, pharmaceuticals, and F&B. Comparable to Koa Glass on glass container manufacturing for cosmetics, but competes from a lower-cost geography with broader end-market exposure.
Direct peers
- Stölzle Glass Group: Austrian pressed and blown glass producer serving perfumery, cosmetics, and pharmaceutical customers. Comparable to Koa Glass in pressed/blowing production techniques and perfumery/cosmetics end markets.
- Verescence: French manufacturer of glass bottles and jars specifically for the perfumery, cosmetics, and skincare industries. Direct competitor to Koa Glass in the cosmetics/perfumery glass packaging niche, with similar product categories (fragrance bottles, cream jars) and premium brand customer base.
- Pochet du Courval: French luxury glass packaging maker serving leading perfumery and cosmetics brands (Chanel, Dior, Guerlain). Highly comparable to Koa Glass as a heritage glass container specialist with integrated decoration and finishing capabilities targeting premium beauty.
- Heinz Glas: German family-owned glass manufacturer specializing in perfume and cosmetics flacons and jars. Direct comparable to Koa Glass given its focus on premium fragrance/cosmetics glass, in-house moldmaking, and decoration capabilities.
- Bormioli Luigi: Italian glassmaker producing bottles and jars for perfumery, cosmetics, and skincare. Comparable to Koa Glass in product mix, European/Japanese cosmetics customer focus, and vertically integrated molding-to-decoration operations.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights6 records
Customer concentration
Koa Glass social profiles
Digital presenceKoa Glass compliance and trust
Trust signalCompliance7 records
Koa Glass financial estimates
Financial estimateRevenue estimate
Valuation estimate
Koa Glass leadership team
Management profileNumber of profiles
Koa Glass subsidiaries and ownership
Company hierarchySubsidiaries3 records
Koa Glass funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Koa Glass M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Koa Glass
What does Koa Glass do?
Koa Glass designs, manufactures, and sells glass containers primarily for the cosmetics industry, covering fragrance bottles, essence containers, lotion bottles, cream jars, nail polish bottles, and diffuser bottles. The company also produces and sells its proprietary Million Guard glass-based antibacterial agent in tablet, powder, and masterbatch forms for use in home appliances, bathroom products, kitchen items, and building materials.
Is Koa Glass a public or private company?
Koa Glass is a private company. It is classified as family owned and is currently operating.
When was Koa Glass founded?
Koa Glass was founded in 1943. It employs 251 to 500 people.
Where is Koa Glass based?
Koa Glass is headquartered in Edogawa, Japan, in the Asia region.
How does Koa Glass make money?
Two revenue lines are on record. Glass Container Manufacturing is the primary driver. The others are antibacterial Agent Sales (Million Guard).
Who are Koa Glass's main competitors?
Broad incumbents on record are SGD Pharma, AGC Inc. (Asahi Glass), Gerresheimer and Nippon Sheet Glass. Piramal Glass is listed as an emerging player. Direct peers are Stölzle Glass Group, Verescence, Pochet du Courval, Heinz Glas and Bormioli Luigi.
Does Koa Glass have an API?
No public API is recorded for Koa Glass.
What industry is Koa Glass in?
Koa Glass's product category is Cosmetic Glass Containers. Its primary akta.pro industry code is IMALAEAC, Cosmetics & Perfumery Glass Packaging (Fragrance Bottles, Cosmetic Jars), with a secondary code of IMALAEAE, Specialty & Decorative Glass Packaging (Custom Shapes, Embossed, Premium). Its NAICS code is 327213 and its SIC code is 3221.