Ishigaki Foods Co

What Ishigaki Foods Co does

Ishigaki Co., Ltd. (株式会社 石垣; TYO:2901) is a Japanese plant engineering and custom-equipment manufacturer founded in 1958, specializing in solid-liquid separation technology and water infrastructure. The company designs and builds, at its Sakaide, Kagawa factory, three core product families: Environmental Machinery (screw press dehydrators across the ISGK family and traveling filter cloth filter presses under the Lasta Filter line), Pumps (submersible and land pumps, drainage pump stations, and the FLOOD BUSTER line — world's first operable-at-any-water-level horizontal submersible pump using air-water mixed operation), and Industrial Machinery (high-speed fiber filtration under the IDW series and specialty systems such as the Platinum System, which recovers fiber from sewage influent for reuse as a dewatering aid). Several products carry Japan Sewage Works Agency New Technology Class I certifications.

The company sells primarily through direct field sales into two customer verticals: government/municipal water and wastewater utilities (sewage treatment plant sludge dewatering, drainage pump stations, flood prevention, water purification) and industrial private enterprises (semiconductor, steel, chemical, food, mining — e.g., Taiwan semiconductor factory, Australia rare-earth facility, New Zealand water utility). Pricing is project-based and quote-driven under public procurement. Revenue is generated through project-based hardware sales (multi-year contracts) and, more recently, managed services via a 20-year FIT biogas power generation concession at Marugame City and entry into Japan's first two-city Water PPP (Level 3.5) in South Osaka. International operations are conducted through an Australian subsidiary and Asian distribution agents; overseas market entry is increasingly structured through JICA-funded surveys and demonstration projects.

The company is privately controlled by the founding Ishigaki family (President Makoto Ishigaki) and listed on the Tokyo Stock Exchange (2901). It maintains a wholly-owned maintenance subsidiary (Ishigaki Maintenance Co., Ltd.), a cloud monitoring service ('miyoru'), and a growing patent and trademark portfolio around its proprietary separation and pump technologies. Market position is anchored by No. 1 domestic share in screw press dehydrators, filter presses, and flood prevention pumps, with a 501-1000 employee base across Tokyo headquarters, an Osaka sales branch, and the Sakaide manufacturing site.

Name

Ishigaki Foods Co

Legal name

株式会社 石垣

Website

https://ishigaki.co.jp

Company type

Private

Founded year

1958

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Ishigaki Co., Ltd. is a Japanese plant-engineering manufacturer (TYO:2901) of custom solid-liquid separation equipment and water infrastructure systems — filter presses, screw press dehydrators, FLOOD BUSTER flood pumps — serving municipal water utilities and industrial customers across Japan and select overseas markets, including a wholly-owned maintenance subsidiary.

Ownership category

akta.pro rank

Product category

Water Infrastructure Equipment

NAICS

Pump and Compressor Manufacturing (33391), Other General Purpose Machinery Manufacturing (3339)

SIC

Pumps & Pumping Equipment (3561), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ)

akta.pro secondary industries

Water Systems & Treatment (Pumps/Boilers/Water Heaters/Filtration) (IMAIABAK), Separation & Filtration Equipment (Filters, Centrifuges, Membranes) (IMAHAEAB), Water Resources, WASH & Integrated Water Management (BPADALAH)

Keywords

• Water treatment equipment
• Solid-liquid separation
• Sludge dewatering
• Flood prevention pumps
• Industrial filtration systems

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

Revenue model

1. Water Infrastructure Equipment Sales (Environmental Machinery & Pumps): Custom-engineered plant equipment sold to municipal water/wastewater utilities and government agencies, including filter presses, screw presses, pumps, and filtration systems. Products are made-to-order with project-based procurement cycles. Revenue is project-driven with long sales cycles.
2. Industrial Machinery Sales: Custom solid-liquid separation equipment sold to industrial customers including semiconductor, steel, chemical, food, and manufacturing companies. Products include filter presses, screw presses, and specialized filtration systems tailored to each customer's process requirements.
3. Plant Engineering & Construction Services: Design, construction, and installation of water treatment and sewage plant facilities, including turnkey projects for municipal clients. Services include construction of sludge processing equipment, digestor tanks, and fiber recovery systems.
4. Digestive Gas Power Generation (民設民営方式): Private ownership and operation of biogas power generation equipment at municipal sewage treatment plants under 20-year concession. Revenue derived from FIT (Feed-in Tariff) electricity sales.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels7 records

Core offering

Ishigaki Co., Ltd. (株式会社 石垣) is a plant engineering manufacturer specializing in water infrastructure and industrial solid-liquid separation equipment. The company designs, manufactures, sells, and services custom-engineered filter presses, screw press dewatering machines, submersible and land pumps, and high-speed fiber filtration systems. It also operates a 20-year biogas power generation concession under a private-ownership model at a municipal sewage treatment plant.

Product overview

ISHIGAKI (株式会社石垣) is a plant engineering and manufacturing company specializing in water infrastructure and industrial machinery. The product portfolio consists of three main divisions: Environmental Machinery (screw presses, filter presses), Pumps (land pumps, submersible pumps, pump gates), and Industrial Machinery (filtration systems). Core products include the ISGK series screw press presses for sludge dewatering, the LASTA filter press series for solid-liquid separation, and the FLOOD BUSTER submersible pump for flood control. The company offers specialized systems like the Platinum System for sewage sludge fiber utilization and cloud-based monitoring service miyoru. Products serve municipal water/wastewater treatment, industrial process water treatment, flood management, and power generation applications.

Differentiator

Problem solved

Functional benefit

Brands

• FLOOD BUSTER: All-speed all-water-level horizontal submersible pump for flood control and drainage applications. Features world-first air-water mixed operation technology to prevent pump chattering.
• Lasta Filter (ラースタフィルター)
• Platinum System (プラチナシステム)
• 湧清水 (Wakishimizu)
• ISGK Series Screw Press

Products and services

• ISD Lasta Filter Press Traveling filter cloth filter press with fully simultaneous board-opening type. Performs solid-liquid separation with superior high-pressure squeezing capability. Used for municipal and industrial sludge dewatering.
• ISF Filter Press Traveling filter cloth filter press (ISF model) without press mechanism. Used for solid-liquid separation in industrial and municipal applications.
• ISDG Lasta Filter Press Traveling filter cloth filter press achieving high-speed processing and space savings. Used for industrial and municipal solid-liquid separation.
• IMD / IMF Lasta Filter Press Cloth-fixed sequential board-opening type filter press for sludge with good dewaterability. Used for industrial and municipal dewatering applications.
• ISGK IV High-Efficiency Press-In Screw Press Dewatering Machine High-efficiency press-in screw press dewatering machine achieving 30%+ higher processing capacity and 1-2 percentage point lower cake moisture versus standard models. Selected as New Technology Class I by Japan Sewage Works Agency. Used for municipal sewage sludge dewatering.
• ISGK III Press-In External Cylinder Reverse Screw Press Energy-saving compact high-performance screw press dewatering machine. Used for municipal and industrial sludge dewatering.
• ISGKD Direct-Type Press-In Screw Press Dewatering Machine Direct-type press-in screw press dewatering machine enabling direct dewatering of unconcentrated sludge via an integrated concentration-dewatering method. Selected as New Technology Class I by Japan Sewage Works Agency.
• ISGKV Hybrid Press-In Screw Press Dewatering Machine Hybrid screw press dewatering machine that integrates the concentration and dewatering sections to achieve further reduction in moisture content of sludge.
• ISGK EXPRESS Mobile Dewatering Vehicle Mobile dewatering system mounted on a vehicle equipped with ISGK-type screw press. Used for emergency or on-site sludge dewatering applications.
• IDW Downward-Flow High-Speed Fiber Material Filtration System Downward-flow high-speed fiber material filtration system offering 4-7x the filtration speed of sand filters. Reduces equipment footprint by 75%+ and supports multiple applications including space-saving, energy-saving, and water-saving.
• IDW-MF Precision Filtration System Precision filtration equipment using special filter media and a press mechanism to remove 1-5 micron suspended solids. Used in industrial process water and semiconductor manufacturing applications.
• IFW Fiber Rapid Filtration System Upward-flow rapid filtration system using fiber filter media. Used for water purification in municipal and industrial water supply.
• ISW Super Rapid Filtration System Upward-flow rapid filtration system using granular floating media. Used for water purification and treatment.
• Platinum System (Sewage Sludge-Derived Fiber Utilization System) First-in-the-world system that selectively recovers fiber material (primarily toilet paper residue) from sewage influent and reuses it as a dewatering aid. Improves sludge dewaterability without purchased chemicals. Selected as New Technology Class I by Japan Sewage Works Agency.
• Murasakishikibu Flow-Through UV Sterilization System Flow-through type UV sterilization and disinfection system using UV light. Environmentally friendly water disinfection system for industrial and municipal applications.
• FLOOD BUSTER (All-Speed All-Water-Level Horizontal Submersible Pump) All-speed all-water-level horizontal submersible pump. Operates continuously with air-water mixed operation technology to solve the chattering problem (repeated pump start/stop). Used for flood prevention and drainage pump stations.
• IDFV Vertical Axial Flow Pump Vertical axial flow pump adaptable to various specifications. Used for water intake, water transfer, and drainage applications.
• PSRV Vertical Screw-Equipped Mixed Flow Pump (Plusspin) Vertical mixed flow pump combining foreign object passability with high efficiency. Used for drainage and flood prevention.
• IAFV Vertical Axial Flow Pump Low-lift, high-capacity vertical axial flow pump. Used for water intake, transfer, and drainage.
• IDFH Horizontal Mixed Flow Pump Horizontal mixed flow pump for discharge and large-capacity applications. Used for drainage and flood control.
• IAFH Horizontal Axial Flow Pump Low-lift, high-capacity horizontal axial flow pump. Used for drainage and large-volume water transfer.
• IDVV Vertical Vortex Mixed Flow Pump Vertical pump combining the strengths of mixed flow and vortex characteristics. Used for drainage and flood prevention.
• ITG-E Inline Water Wheel Generator Inline water wheel generator that produces electricity from water supply or factory process water through in-pipe installation. Used for small-scale hydropower generation.
• IDS-G Pump Reverse Water Wheel Generator Pump reverse water wheel generator for water intake, water transfer, and dam maintenance discharge equipment. Used for hydropower generation.
• IPOA-G Siphon Vertical Water Wheel Generator

Quantifiable outcome

• FLOOD BUSTER achieved continuous 59-hour operation during 2018 West Japan torrential rain, discharging approximately 78,000 tons of water
• +3 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• 石垣メンテナンス株式会社 (Ishigaki Maintenance Co., Ltd.)coreStrategic or Co-development Partner · 26 February 2026Related company within the Ishigaki Group. Ishigaki Maintenance was selected as a member of the joint venture 'South Osaka Wide-area Sewerage Service' for Japan's first two-city joint下水道ウォーターPPP事業 (Level 3.5) in Osaka Sayama and Kawachinagano. This is Ishigaki Group's first Water PPP project participation.
• JICA (Japan International Cooperation Agency)coreGTM or Marketing Partner · 1 January 2023FLOOD BUSTER adopted in JICA's overseas needs confirmation survey for Southeast Asia (SDGs Business Needs Confirmation Survey on Operable at Any Water Level Type Horizontal Submersible Pump). Joint project area: Southeast Asia.
• 日本下水道事業団 (Japan Sewage Works Agency)coreStrategic or Co-development Partner · 1 January 2022Collaborated with Japan Sewage Works Agency and Japan Techno Co., Ltd. on the Vietnam WOW TO JAPAN Project demonstration of FLOOD BUSTER pump gate technology in Vinh City, Nghe An Province, Vietnam, sponsored by Vietnam Ministry of Construction and Japan's MLIT.
• 山野設備工業株式会社 (Yamano Setsubi Kogyo Co., Ltd.)coreStrategic or Co-development Partner · 30 April 2021Ishigaki and Yamano Setsubi formed a special joint venture (特定建設共同企業体) for the Marugame City Purification Center sludge processing equipment construction project. Ishigaki serves as the representative partner. Joint venture value: 1.98 billion JPY.
• 株式会社大原鉄工所 (Ohara Tekkosho Co., Ltd.)coreStrategic or Co-development Partner · 26 March 2021Ishigaki and Ohara Tekkosho formed a joint venture (石垣・大原鉄工所共同企業体) for the Marugame City New Purification Center biogas power generation project. Ishigaki is the representative partner. 20-year concession for FIT (Feed-in Tariff) digestive gas power generation at 120kW capacity.
• 日本下水道事業団 (Japan Sewage Works Agency)coreStrategic or Co-development Partner · 1 January 2017Co-developed the Platinum System technology (下水汚泥由来繊維利活用システム), which was selected as New Technology Class I by the Japan Sewage Works Agency in 2017. This is a joint development partnership for sewage treatment innovation.
• Japan Techno Co., Ltd. (日本テクノ株式会社)minorStrategic or Co-development PartnerJoint venture partner with Ishigaki and Japan Sewage Works Agency for Vietnam FLOOD BUSTER demonstration project under the WOW TO JAPAN initiative.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Andritz AG: Austrian industrial group with a strong separation technologies business supplying filter presses and sludge dewatering equipment to municipal and industrial customers. Directly comparable to Ishigaki in solid-liquid separation technology and water infrastructure.
• Sulzer Ltd. Swiss industrial company with a strong pumps business serving water, wastewater, and industrial fluid handling. Comparable to Ishigaki in pumps and engineered fluid systems, especially for municipal and industrial water infrastructure.
• KSB SE & Co. KGaA: German pump and valve manufacturer with significant exposure to water supply, wastewater, and flood control applications. Directly comparable to Ishigaki's pump portfolio for municipal and industrial water infrastructure.
• Alfa Laval: Global leader in separation and filtration equipment, including filter presses and decanter centrifuges for municipal and industrial solid-liquid separation. Closely comparable to Ishigaki's core dewatering and filtration product lines, with broader geographic reach.
• Xylem Inc. U.S.-listed pure-play water technology company providing pumps, filtration, and treatment systems for municipal and industrial water applications. Comparable on product category, target customers, and global go-to-market model, though at significantly larger scale.
• Ebara Corporation: Major Japanese industrial machinery and pump manufacturer with a strong water infrastructure and fluid handling business. Directly comparable to Ishigaki on pumps for water/wastewater and flood control, but operates at much larger scale with a broader product portfolio.

Emerging players

• Metso Corporation: Finnish industrial company with separation and filtration equipment for mining, minerals, and water applications. Comparable to Ishigaki's industrial solid-liquid separation business, especially for mining and minerals processing customers like Ishigaki's Australian rare earth client.

Broad incumbents

• Pentair plc: U.S.-listed water treatment and flow technologies company serving residential, commercial, and industrial customers. Adjacent competitor in filtration and water treatment equipment, with comparable exposure to industrial process water.
• Veolia Environnement: Global environmental services and water infrastructure operator with both equipment supply and concession/PPP operations. Comparable to Ishigaki in municipal water/wastewater and increasingly in Water PPP, but operates at vastly larger scale and integrates services.
• Kubota Corporation: Diversified Japanese industrial group with a substantial water infrastructure and pump business serving municipal and agricultural markets. Overlaps with Ishigaki in water and wastewater equipment but operates as a broad incumbent across many end markets.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCizCHAaxQd3J-80LBzq87AQ
• Instagraminstagram.com/ishigaki_water

Compliance2 records

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

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Ishigaki Foods Co