What Kunimine Industries does

Kunimine Industries Co., Ltd. is a Japan-based, vertically integrated bentonite producer founded in 1943 and listed on the Standard Market of the Tokyo Stock Exchange. The company operates three business segments: a Bentonite Business supplying processed clay for casting/foundry, civil engineering and construction, waste disposal, and pet care products; a Clay Sciences Business producing high-purity refined bentonite (KUNIPIA series), synthetic smectite (SUMECTON series), and derived specialty materials for cosmetics, paints/inks, resins, pharmaceuticals, and life sciences; and an Agribusiness providing contract manufacturing of granular agrochemical formulations alongside growth-promoting fertilizers and feed additives. Revenue is generated through one-time sales of mined and processed bentonite products, professional-services contract manufacturing for agrochemical customers, and licensing/royalty positioning for higher-value refined clays, with FY2025 consolidated sales of ¥15.7 billion across approximately 240 consolidated employees.

The company's technical platform rests on 80+ years of accumulated clay mineral processing know-how, supported by self-owned mining operations in Yamagata Prefecture (Tsukinuno) via subsidiary KUNIMAIN and a network of subsidiary mines (Kawasaki Mining, Kanben Mining), plus two dedicated R&D centers (Kuroiso and Iwaki). Notable proprietary technologies include KUNIPIA (non-chemical purification of montmorillonite), SUMECTON (hydrothermal synthesis of saponite/stevensite/hectorite), Pickering Emulsification using clay as a surfactant alternative (COSMOS APPROVED certified since 2021), an organic-modified KUNIVIS series for solvent systems, and a clay-based hydrogen gas barrier coating showing a 25,000-fold improvement over nylon at high temperatures. Recent university-industry collaborations with Osaka University (Kuni-Grow+ 3D cell culture reagent) and Tokyo University of Science (ACCELL CORE protein crystallization promoter) extend the platform into life sciences.

Commercially, Kunimine runs a B2B industrial sales-led go-to-market, distributing through the Tokyo headquarters, Nagoya and Osaka branches, and group companies (KUNIMINE MARKETING for pet products in Japan; KUNIMINE THAILAND for Southeast Asia). Customer end-markets span foundry, construction, cosmetics, agrochemicals, food and beverage, oil and gas (via drilling mud), nuclear waste containment, and pharmaceutical research. Pricing is not publicly disclosed; channel mix is direct-enterprise sales with event-driven demand generation through exhibitions such as nano tech and CITE JAPAN. The company holds ISO 14001, ISO/TS 21236-2:2021 testing laboratory designation, Organic JAS registration, and API specifications for KUNIGEL GT drilling mud.

Name

Kunimine Industries

Legal name

KUNIMINE INDUSTRIES CO., LTD.

Website

https://kunimine.co.jp

Company type

Public

Founded year

1943

Operating status

Operating

Headcount range

101–250 employees

Short description

Kunimine Industries is a vertically integrated Japanese bentonite producer founded in 1943, mining and processing clay into commodity bentonite products plus high-purity refined (KUNIPIA) and synthetic (SUMECTON) specialty clays for foundry, construction, cosmetics, agrochemical, pharmaceutical, and life sciences customers.

Ownership category

akta.pro rank

Product category

Industrial Minerals and Specialty Clay Materials

NAICS

Ground or Treated Mineral and Earth Manufacturing (327992), Clay Building Material and Refractories Manufacturing (327120)

SIC

Abrasive, Asbestos & Misc Nonmetallic Mineral Prods (3290)

akta.pro primary industry

Kaolin & Industrial Clay Mining (Bentonite, Ball Clay, Fuller’s Earth) (IMAKAGAJ)

akta.pro secondary industry

Bentonite & Other Smectite Clays (IMAEAFAE)

Keywords

• Bentonite products
• Specialty clay minerals
• Foundry casting materials
• Agrochemical contract manufacturing
• Industrial mineral refining

Headquarters

HQ city

Sumida

HQ country

Japan

HQ region

Asia

Offices12 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Bentonite Mining and Product Sales: Core business involving mining, processing, and selling of bentonite and bentonite-based products including raw materials for various industrial applications (casting, construction, agriculture, cosmetics, environmental).
2. Contract Manufacturing Services: Contracted manufacture and packaging of agrochemical formulations (granular pesticides, water dispersible granules, jumbo formulations, herbicides, pesticides, germicides) at dedicated manufacturing plants (Onahama, Koriyama, Ota factories).
3. Pet Products: Manufacturing and sale of bentonite-based toilet sand for pets through KUNIMINE MARKETING CO., LTD.
4. Refined Clay Products (KUNIPIA/SUMECTON): Sale of high-purity refined bentonite (KUNIPIA) and synthetic clay (SUMECTON) for use in cosmetics, paints, coatings, pharmaceuticals, and other advanced materials applications.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Kunimine Industries mines, processes, and sells bentonite-based products for industrial use. The company produces raw bentonite materials, refined bentonite (KUNIPIA), synthetic smectite (SUMECTON), and downstream products for foundry casting, civil engineering, waterproofing, waste disposal, agrochemical carriers, cosmetics, food additives, life sciences research, and pet toilet sand. It also operates contract manufacturing of granular agrochemical formulations at dedicated plants.

Product overview

Kunimine Industries operates three core business segments centered on bentonite, a clay mineral with 1,000+ industrial applications. The Bentonite Business provides raw and processed bentonite products (KUNIGEL, KUNIBOND, KUNISEAL series) for civil engineering, construction, casting, waste disposal, boring, and pet care markets. The Clay Sciences Business offers refined bentonite (KUNIPIA series) and synthetic smectite (SUMECTON series) for fine chemicals, cosmetics, agrochemicals, and life sciences applications including Kuni-Grow+ cell culture reagents and ACCELL CORE protein crystallization materials. The Agribusiness provides contracted manufacturing for agrochemical formulations, growth-promoting fertilizers (Peption), and feed additives. The portfolio includes both commodity bentonite products and high-value specialty materials like organic-modified clays (KUNIVIS), Pickering emulsion systems, and hydrogen barrier coatings.

Differentiator

Problem solved

Functional benefit

Brands

• KUNIPIA: High-purity refined bentonite product line - removes impurities from natural bentonite to maximize montmorillonite purity. Used in cosmetics, paints, resin fillers, and various industrial applications.
• SUMECTON
• KUNIGEL
• KUNISEAL
• KUNIMINE Peption
• KUNIBOND
• KUNIVIS
• Kuni-Grow+

Products and services

• KUNIPIA Series (Refined Bentonite) High-purity refined bentonite with maximized montmorillonite content achieved through impurity removal without chemical processing. Used as viscosity modifiers, antisettling agents for water-based paints and cosmetics, and resin fillers for gas barrier properties.
• SUMECTON Series (Synthetic Smectite)

Quantifiable outcome

• 105-fold improvement in gas barrier property compared to resin alone when using clay fillers at 60-80wt% concentration
• +3 more outcomes

Named customers5 records

Segments10 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Osaka University Graduate School of Pharmaceutical SciencescoreStrategic or Co-development Partner · 13 February 2025Industry-academia collaboration resulting in Kuni-Grow+ 3D cell culture reagent. Won Minister of Education, Culture, Sports, Science and Technology Award at Japan Open Innovation Prize. Professor Tsujikawa Kazutake collaborated on research.
• Japan Vegetable Seedling AssociationminorStrategic or Co-development Partner · 21 February 2024Supporting member promoting seedling technology. Introduces KUNIMINE Peption growth-promoting fertilizer to members.
• Tokyo University of SciencecoreStrategic or Co-development PartnerCollaborative research on clay mineral applications for protein crystallization. Jointly developed ACCELL CORE product for promoting and controlling protein crystallization in pharmaceutical research.
• JAXA (Japan Aerospace Exploration Agency)minorStrategic or Co-development PartnerJoint research on space exploration innovation. Clay nanoplate composite materials research.
• National Institute of Advanced Industrial Science and Technology (AIST) Tohoku CenterminorStrategic or Co-development PartnerJoint research on clay nanoplate composite materials. Technology visited by METI Minister Nishimura in July 2023.

Scale indicators7 records

Recent moves16 records

Expansion highlights7 records

Direct peers

• Ashapura Minechem Limited: Ashapura Minechem is one of the world's largest bentonite producers, with mining operations in India and global exports to foundry, iron ore pelletizing, drilling mud, and specialty markets. It is a direct competitor in the core bentonite mining business with comparable vertical integration.
• Wyo-Ben Inc. Wyo-Ben is a US-based bentonite producer mining Wyoming sodium bentonite for drilling, construction, foundry, and specialty applications. It is a direct regional peer with comparable bentonite mining and processing operations targeting similar industrial end-markets as Kunimine's commodity bentonite business.
• Sensient Technologies Corporation: Sensient Technologies is a specialty ingredients supplier producing colors, flavors, and cosmetic/personal care ingredients including natural and mineral-based raw materials. It competes with Kunimine's COSMOS-certified KUNIPIA cosmetics-grade clay ingredients in the personal care specialty ingredients market.
• BYK-Chemie (ALTANA): BYK-Chemie is a specialty additives manufacturer producing rheology modifiers and surface additives for paints, coatings, and plastics, including clay-based rheology control agents. It competes with Kunimine's KUNIVIS organic bentonite series and KUNIPIA-based paint additives in the coatings and resin filler markets.
• Elementis plc: Elementis is a specialty chemicals company producing rheology modifiers and clay-based additives (including bentonite derivatives) for personal care, coatings, and industrial markets. It directly competes with Kunimine's KUNIPIA/SUMECTON-based rheology control and KUNIVIS organic bentonite offerings in cosmetics and coatings.

Broad incumbents

• Imerys: Imerys is the world's largest specialty mineral-based solutions provider, producing bentonite, kaolin, and other industrial minerals for foundry, construction, cosmetics, and pharma applications. It is a broad incumbent competitor with overlapping product categories to Kunimine across all major bentonite end-markets.
• Mineral Technologies Inc. Mineral Technologies is a global specialty mineral company with bentonite processing capabilities serving foundry, construction, and consumer products. It is a broad incumbent peer with overlapping product portfolio and similar vertical integration across mining and downstream specialty applications.
• Bentonite Performance Minerals (Clariant): Bentonite Performance Minerals is Clariant's specialty bentonite business serving foundry, construction, and oilfield applications. As part of broader specialty chemicals giant Clariant, it represents a broad incumbent peer competing with Kunimine's KUNIGEL/KUNIBOND foundry and civil engineering bentonite product lines.

Regional players

• Laviosa Minerals (Laviosa Group): Laviosa is an Italian bentonite producer and processor serving foundry, cat litter, civil engineering, and specialty applications across European and global markets. It is a regional European peer competing with Kunimine in international bentonite supply for foundry and pet litter markets.

Emerging players

• Kobo Products Inc. Kobo Products is a specialty supplier of raw materials and surface treatment pigments for the cosmetics and personal care industry, including mineral-based ingredients. It is an emerging player that may intersect with Kunimine's KUNIPIA/SUMECTON-based cosmetic ingredient offerings in the premium skincare and color cosmetics segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries6 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 Kunimine Industries