Ihara Furnace

What Ihara Furnace does

Ihara Furnace Co., Ltd. is a Japanese industrial furnace engineering company founded in 1892 in Osaka, specializing in the design, construction, repair, and maintenance of glass melting furnaces, various industrial furnaces, and environmental plants. The company holds approximately 60% of Japan's domestic market share in glass furnace construction — the highest among more than 100 member companies of the Japan Furnace Association — and has served major Japanese industrial clients including Nippon Steel, Sumitomo Metal Industries, Nippon Sheet Glass, and AGC. Its core technology integrates chemistry, materials science, mechanical, electrical, and control engineering disciplines, and is reinforced by proprietary innovations such as the MAP (Micro Arc Processing) method for hot repair, a 1600°C-capable furnace endoscope, the Checkerscope, the Phoenix Eye monitoring camera, the cullet preheater (achieving 28% fuel reduction), and the Glass Brain instrumentation and control system.

The company operates through three business segments: Core Business (furnace construction, repair/maintenance, refractory sales, original equipment, chimney construction), Solution Business (high-temperature observation, thermal cleaning), and Growth Strategy Business (exhaust gas treatment via subsidiary Nafco, and overseas plant construction). Revenue is generated primarily through project-based engineering contracts (one-time project fees) supplemented by proprietary equipment sales, refractory distribution (as special distributor for AGC Ceramics and AGC Plibrico), and ongoing maintenance services. The company maintains 20 offices across Japan, Taiwan, China, Indonesia, South Korea, and Thailand, with 616 total group employees, and serves glass manufacturers, steel and non-ferrous metal producers, chemical/ceramics companies, and municipal governments.

Ihara Furnace is a privately held, family-controlled corporation (Ihara family, with Shogo Ihara as current President since February 2024). The firm has maintained full profitability for approximately 50 consecutive years with an equity ratio above 60%, reflecting a financially conservative, cash-generative operating model. Distribution is entirely direct enterprise field sales with no resellers; customer acquisition relies on long-term relationship management, international trade exhibitions (GLASSTEC, CHINA GLASS, GLASSTECH ASIA), and brand visibility through local media and station advertising in the Kansai region.

Name

Ihara Furnace

Legal name

IHARA FURNACE CO.,LTD.

Website

https://ihara-furnace.co.jp

Company type

Private

Founded year

1892

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Ihara Furnace is a 130+ year-old Japanese industrial furnace engineering firm that designs, constructs, and maintains glass melting furnaces, industrial furnaces, and environmental plants for glass, steel, chemical, and municipal customers, holding ~60% of Japan's glass furnace market.

Ownership category

akta.pro rank

Product category

Industrial Furnace Engineering

NAICS

Industrial Process Furnace and Oven Manufacturing (333994), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Clay Building Material and Refractories Manufacturing (32712), Power Boiler and Heat Exchanger Manufacturing (33241)

SIC

Industrial Process Furnaces & Ovens (3567), Special Industry Machinery (No Metalworking Machinery) (3550), Fabricated Plate Work (Boiler Shops) (3443)

akta.pro primary industry

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE)

akta.pro secondary industries

Boilers, Furnaces & Process Heating Equipment (IMAHAKAD), Refractory, Furnace & Kiln Maintenance Services (IMAIACAG)

Keywords

• Industrial furnace construction
• Glass melting furnace engineering
• Refractory materials sales
• Furnace maintenance repair
• Environmental plant engineering

Headquarters

HQ city

Osaka

HQ country

Japan

HQ region

Asia

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Industrial Furnace Plant Design and Construction: Design and construction of various industrial furnace plants including glass melting furnaces, incinerators, and environmental facilities. Projects range from new construction to repairs and maintenance. Revenue recognized on a project-by-project basis, typically spanning 2-3 months per project on average, with large-scale projects extending over a year.
2. Environmental Plant Design and Construction: Design and construction of environmental plants including exhaust gas treatment equipment and waste incineration facilities, carried out through subsidiary Nafco Co., Ltd.
3. Refractory Sales: Sales of refractory materials and related products including AGC Ceramics furnace materials (as a special distributor), AGC Plibrico products, and other refractory manufacturers' products. Includes refractory selection consultation.
4. Original Equipment Sales: Sales of proprietary furnace equipment including cullet preheaters, electrode boosting systems, electric melting furnaces, recuperators, hot air burners (ISB-500-G), glass levelers (GLASS PECKER, SMART-HERON), and furnace monitoring cameras (Phoenix Eye).
5. Furnace Maintenance and Repair Services: Thermal repair (hot repair), cold repair, and ongoing maintenance services for furnaces. Includes emergency repair work, MAP method anchoring, thermal cleaning, and regular maintenance contracts.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Ihara Furnace is an engineering firm specializing in the design, construction, repair, and maintenance of industrial furnaces — primarily glass melting furnaces, various industrial furnaces (incinerators, melting, heating, heat treatment, drying furnaces), and environmental plants. The company delivers turnkey projects from initial consultation and design through procurement, on-site construction, commissioning, and ongoing after-sales maintenance, supported by proprietary equipment such as the Phoenix Eye monitoring camera, GLASS PECKER/SMART-HERON glass levelers, Glass Brain control system, Cullet Preheater, IFC Recuperator, ISB-500-G burners, electric boosting systems, and the MAP Method refractory anchoring technology.

Product overview

IHARA FURNACE is a comprehensive furnace engineering company offering a multi-product portfolio organized into Core Business (ガラス溶解炉築炉工事, 各種工業炉築炉工事, 温修/補正工事, ガラスプラン卜工事, 急速昇温・乾燥焚き, 耐火物販売, オリジナル装置販売, 煙突工事), Solution Business (高温炉内観察エンドスコープ, チェッカースコープ, サーマルクリーニング), and Growth Strategy Business (環境事業/排ガス処理設備, 海外プラン卜). The product lineup includes specialized equipment such as Phoenix Eye furnace monitoring cameras, GLASS PECKER/SMART-HERON glass levelers, ISB-500-G hot air burners, IFC recuperators, electric boosting systems, cullet preheaters, and the MAP Method for refractory anchor installation. The company serves glass manufacturing, steel, non-ferrous metals, chemicals, and ceramics industries with both domestic (60% glass furnace market share) and international operations across 5 overseas locations.

Differentiator

Problem solved

Functional benefit

Products and services

• Glass Melting Furnace Construction (ガラス溶解炉築炉工事) Construction services for glass melting furnaces including drain out work, demolition, and furnace construction (築炉). Core technology area with 60% domestic market share in glass furnace construction in Japan.
• Various Industrial Furnaces Construction (各種工業炉築炉工事) Construction of various industrial furnaces including incinerators, melting furnaces (copper, aluminum, zinc), firing furnaces, heating furnaces, heat treatment furnaces, and drying furnaces.
• Hot Repair (熱間補正) Repair works to extend furnace life and improve efficiency, performed both when furnace is stopped and during operation (hot repair). Includes chain saw cutting of refractories and thermal spraying repairs.
• MAP Method (MAP工法) Micro Arc Processing method using electrical anchors to safely and quickly attach to refractories, preventing bricks from falling or collapsing without stopping furnace production. Applicable to clay bricks, alumina-zirconia bricks, and fused cast bricks.
• Plant Engineering - Glass Plant Construction (ガラスプラント工事) Design and construction of glass melting furnaces for bottle, tableware, and electric glass manufacturing, including gas/oil combustion types and electric furnaces.
• Batch Charger (原料投入機) Screw type (ISC), blanket type (IBC), and oscillate type batch chargers for feeding raw materials into furnaces, optimized based on furnace shape and material characteristics.
• Batch Plant (原料調合設備) Material mixing and preparation systems designed for ease of operation and maintenance with space-saving robust construction, addressing measurement errors and contamination issues.
• Glass Brain Instrumentation and Control System (炉計装制御設備) Control systems including Glass Brain for maximum furnace performance, furnace pressure control valves, designed for operability, high efficiency, productivity, energy saving, and long furnace life.
• Combustion Equipment (燃焼設備) Burners, reversible valves, and combustion units optimized for maximum furnace performance, supporting various fuel types including gas and liquid fuels.
• Combustion Control System (燃焼制御装置) Combustion control systems that directly affect product quality and fuel consumption, utilizing proprietary know-how for optimal furnace state maintenance.
• GLASS PECKER Glass Leveler (ガラスレベラー) High-precision contact-type device for glass level control, Model GLB8210 (Electric Motor Drive). Simple structure with easy operation, stable control even in severe furnace conditions.
• SMART-HERON Glass Leveler (スマートヘロン) Air drive type glass leveler model GLB9001 for stable glass level control in harsh furnace environments.
• Phoenix Eye Furnace Monitoring Camera (炉内監視カメラ) Industrial monitoring system for stable monitoring of glass melting furnace interiors in hot and severe conditions. Features high resolution CCD camera, lightweight design (~20kg), and easy maintenance. Optional emergency retraction for power/water failures.
• Rapid Heat Equipment (急速昇温・乾燥焚き) High-load multi-hole combustion equipment enabling rapid heating and drying of industrial furnaces in short periods with uniform heating.
• Chimney Construction (煙突工事) Construction, demolition, reinforcement with carbon sheets, and repair of concrete and steel chimneys. Includes inspection services and maintenance, with expertise in four-legged steel chimneys up to 220 meters height.
• ISB-500-G Hot Air Burner (ホットエアバーナー) Nozzle mix type burner developed jointly with Masahide Seisakusho Co., Ltd. for glass melting furnaces. Features adjustable flame shape, ability to use preheated air, and reduced heat loss from burner body. Available in gas (ISB-500-G) and heavy oil (ISB-500-OL) variants.
• IFC Recuperator / Heat Exchanger (IFCレキュペレーター) Metal heat exchanger utilizing exhaust gas heat, capable of producing preheated air up to 800°C. Advantages include lower equipment cost, compact installation area, simple combustion control, easy maintenance, stable furnace temperature/pressure control, and precise air-fuel ratio control.
• Electric Boosting System (電気ブースティングシステム) System combining CRI (American company) technology with IFC's proprietary know-how. Features water-cooled electrode holders (closed type) with high cooling efficiency that protect electrodes and surrounding refractories from damage. Widely used in bottle glass furnaces domestically and internationally.
• Electric Melting Furnace (電気溶解炉) Electric melting furnaces developed by fusing IFC's original technology with CRI (American company) technology. Includes full electric melting furnaces, electrode holders, power control devices, and model experiments for furnace diagnostics.
• Cullet Preheater (カレット予熱装置) Energy-saving device that preheats cullet (crushed recycled glass) using high-temperature exhaust gas. Achieves 28% fuel reduction when using 100% cullet compared to non-preheating operation.
• Refractory Sales (耐火物販売) Sales of various refractories including special distributor for AGC Ceramics products and AGC Plibrico products, with product selection consultation available.
• High-Temperature Furnace Observation Endoscope (高温炉内観察エンドスコープ) Special observation equipment resistant to 1600°C temperatures for observing furnace interiors during high-temperature operation. Enables viewing via naked eye or TV monitor with video/still image recording for repair planning and aging change documentation.
• Checkerscope (チェッカースコープ) Endoscope developed by IFC for precise observation of checker brick clogging inside regenerators. Extends up to 3m, can be used with endoscope for effective observation, and confirms thermal cleaning results.
• Thermal Cleaning (サーマルクリーニング) Service using jet burner to heat checker bricks from below regenerator to melt and remove solidified matter (sodium sulfate, dispersed raw materials), restoring combustion efficiency and extending furnace life.
• Exhaust Gas Treatment Equipment / Environment Business (環境事業 / 排ガス処理設備) Exhaust gas treatment equipment construction via subsidiary NAFCO Co., Ltd., including dust collectors design, manufacturing, and installation for various plant equipment.
• Overseas Glass Plant Construction (海外硝子プラント工事) Plant construction services through 5 overseas locations (Taiwan, China, Indonesia, Korea, Thailand). Comprehensive furnace engineering from brickwork to full plant construction with emergency response capability.
• Overseas Incinerator Plant Construction (海外焼却炉プラント工事) Design, construction, and maintenance of incinerator plants including city waste treatment plants and 24-hour continuous operation or batch-type industrial waste treatment plants, primarily in Southeast Asia.

Quantifiable outcome

• 28% fuel consumption reduction achieved when using cullet preheater with 100% cullet compared to non-preheating scenario
• +3 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

Six partnerships are on record, tiered minor and core.

• Antonini Company (Italy)minorGTM or Marketing Partner · 1 January 1995Italian company with which a sales partnership was established in 1995 for annealing lehr (徐冷炉) products, complementing Ihara Furnace's glass furnace line.
• AGC Ceramics Co., Ltd. (AGCセラミックス株式会社)coreChannel Partner/ Reseller/ DistributorOfficial special distributor (特約店) for AGC Ceramics furnace materials. Provides refractory product selection consultation and sales as part of Ihara Furnace's comprehensive refractory sales business.
• AGC Plibrico Co., Ltd. (AGCプライブリコ株式会社)minorChannel Partner/ Reseller/ DistributorAuthorized goods distributor for AGC Plibrico products, complementing the refractory sales lineup.
• Masahide Seisakusho Co., Ltd. (株式会社正英製作所)coreTechnology or IntegrationCombustion technology specialist that co-developed the ISB-500-G hot air burner with Ihara Furnace for glass melting furnace applications. Masahide Seisakusho contributes combustion engineering expertise while IFC provides furnace application knowledge.
• CRI Company (United States)coreTechnology or IntegrationAmerican technology company (formerly connected through IFC's subsidiary IFCO) whose electrode boosting technology and electric melting furnace expertise was combined with IFC's own know-how to create the electrode boosting system and electric melting furnace product line. CRI technology was introduced to Japan through IFC as its agent starting 1984.
• Nafco Co., Ltd. (ナフコ株式会社)coreStrategic or Co-development PartnerWholly-owned subsidiary specializing in design, manufacturing, and installation of various dust collection equipment. Acquired by Ihara Furnace in 2014. Handles exhaust gas treatment equipment construction for Ihara Furnace's environmental plant projects.

Scale indicators8 records

Recent moves16 records

Expansion highlights6 records

Direct peers

• SORG (Sorg Maschinenbau GmbH): SORG is a Germany-headquartered engineering firm specializing in the design, construction, and modernization of glass melting furnaces and batch plants. It is the closest direct competitor to Ihara Furnace's core glass furnace construction business globally.
• Heye International GmbH: Heye International provides glass container production technology including furnace and forehearth systems. It overlaps with Ihara Furnace in glass melting furnace engineering for the container glass segment.
• Horn Glass Industries AG: Horn Glass Industries is a German specialist in glass furnace engineering, batch plants, and cullet systems. Comparable to Ihara Furnace as a competing full-service glass furnace engineering contractor serving international customers.
• StrikoWestofen GmbH: StrikoWestofen designs and supplies melting and holding furnaces for non-ferrous metals and special glass applications. Comparable to Ihara Furnace's non-ferrous metal and industrial furnace construction segments.
• Swindell Dressler International: Swindell Dressler designs and builds industrial furnaces for steel, aluminum, and ceramic applications. Comparable as a long-established U.S. industrial furnace construction engineering firm serving similar metallurgy customers.

Broad incumbents

• RHI Magnesita: RHI Magnesita is the world's largest refractory producer and offers installation services. Comparable to Ihara Furnace's refractory sales stream (including AGC Ceramics distribution) and adjacent in furnace maintenance services.
• HarbisonWalker International: HarbisonWalker is a major North American refractory manufacturer and installer serving steel, glass, and chemical customers. Overlaps with Ihara Furnace's refractory sales and furnace maintenance capabilities at a broader portfolio scale.

Emerging players

• BNZ Materials: BNZ Materials manufactures refractory and high-temperature insulation products used in industrial furnace linings. Comparable to Ihara Furnace's refractory sales offering, though smaller and product-focused rather than full-service engineering.

Others

• Pyrotek Inc. Pyrotek supplies consumables, refractories, and engineered equipment for non-ferrous metal and glass operations. Adjacent supplier to furnace operators; complements rather than competes with Ihara Furnace's construction services.
• AGC Ceramics Co., Ltd. AGC Ceramics is a Japanese refractory manufacturer whose products Ihara Furnace distributes as a special distributor. A material supplier and indirect channel partner rather than a competitor in furnace construction.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ihara-furnace-co-ltd-

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries9 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 Ihara Furnace