What Yamasaki Corporation does

Yamasaki Corporation (株式会社ヤマサキ) is a Japan-based specialty industrial services company founded in 1875 in �muta, Fukuoka Prefecture. Its core business is furnace building (築炉) — the construction, renovation, and maintenance of large industrial furnaces for major Japanese steel manufacturers, including blast furnaces approximately 100 meters tall, coke ovens approximately 150 meters long, converters, and heating furnaces operating at temperatures exceeding 1,500°C. The work demands millimeter-level precision bricklaying with proprietary refractory installation techniques in extreme thermal environments, drawing on 140+ years of accumulated craftsmanship.

The company's revenue model combines project-based professional services for enterprise steel customers with a small consumer-facing restaurant franchise operation under the Pietro pasta brand (two locations at AEON Mall Omuta and Yume Town Hamanasu) and equipment sales supporting its furnace operations. It generated approximately 17.4 billion yen in annual revenue as of August 2025 and employs 580 people, including a steady pipeline of skilled technicians produced through its company-operated vocational training school, Yamasaki College of Technology (founded 1970), which maintains a near-100% pass rate on Level 1 and Level 2 furnace construction certification exams.

Yamasaki Corporation operates regional offices across Japan's five major industrial regions (Kanto, Kansai, Kyushu, Chugoku, Tohoku), with several offices physically co-located inside customer steelworks such as Nippon Steel's Kashima, Wakayama, and Yawata facilities. Since 2018, the company has operated as a wholly-owned subsidiary of Yamasaki Holdings Corporation under family-controlled management led by President Kazumasa Yamasaki (山�一正). The business is entirely domestic, with its only historical international footprint being a 1970s technical guidance and joint venture engagement with South Korea's POSCO (Pohang steelworks). Key enterprise customers include Nippon Steel, JFE Steel, Kawasaki Heavy Industries, Shinagawa Refractories, Nippon Steel Texeng, and Japan Coke.

Name

Yamasaki Corporation

Legal name

株式会社ヤマサキ

Website

https://yamasaki-grp.co.jp

Company type

Private

Founded year

1875

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Yamasaki Corporation is a Japan-based specialty contractor founded in 1875 that builds and maintains industrial blast furnaces, coke ovens, and heating furnaces for major steel manufacturers, supplemented by a small Pietro restaurant franchise business and an in-house vocational training school.

Ownership category

akta.pro rank

Product category

Industrial Furnace Construction Services

NAICS

Industrial Process Furnace and Oven Manufacturing (333994), Power Boiler and Heat Exchanger Manufacturing (332410)

SIC

Industrial Process Furnaces & Ovens (3567), Fabricated Plate Work (Boiler Shops) (3443)

akta.pro primary industry

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE)

akta.pro secondary industry

Metals & Steel Mill Facility Construction (IMAFADAF)

Keywords

• Industrial furnace construction
• Refractory installation services
• Blast furnace building
• Coke oven construction
• Steel mill maintenance

Headquarters

HQ city

Fukuoka

HQ country

Japan

HQ region

Asia

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Furnace construction and maintenance services: Core revenue from construction, maintenance, and repair of industrial furnaces for steel manufacturers. Services include blast furnace construction, coke oven building, converter maintenance, and heating furnace work. Revenue is project-based with multi-year client relationships.
2. Restaurant franchise operations: Operating two Pietro pasta restaurant franchises at shopping mall locations (AEON Mall Omuta and Yume Town Hamanasu). Revenue from food and beverage sales to individual consumers.
3. Construction machinery and equipment sales: Manufacturing and sale of construction machinery, tools, and equipment used in furnace construction operations.

Go-to-market motion2 records

Core offering

Yamasaki Corporation provides specialized industrial furnace construction, renovation, and maintenance services for steel manufacturers, including the building of blast furnaces (approximately 100m tall), coke ovens (approximately 150m long), converters, and heating furnaces operating in environments exceeding 1,500°C. Services require millimeter-level precision bricklaying and refractory material installation, delivered through dedicated on-site offices at major Japanese steelworks. The company also operates two Pietro pasta restaurant franchises at shopping mall locations as a secondary consumer-facing business.

Product overview

Yamasaki Corporation is a diversified industrial company with three main business segments: (1) Furnace Building Business (築炉事業) as its core operations, providing industrial furnace construction and maintenance for major Japanese steel manufacturers including Nippon Steel and JFE Steel, with a 140+ year history dating to 1875; (2) Restaurant Business operating two Pietro pasta restaurant franchises at shopping malls; and (3) Yamasaki College of Technology, a vocational training school that trains furnace construction technicians with near-100% certification exam pass rates. The company employs 580 people and generated 17.4 billion yen in annual revenue (as of August 2025).

Differentiator

Problem solved

Functional benefit

Brands

• 山﨑高等技術専門校 (Yamasaki College of Technology): Vocational training school for furnace construction skills, established 1970, offering 1-year program for high school graduates to become furnace construction specialists

Products and services

• Furnace Building Business (築炉事業) Industrial furnace construction, renovation, and maintenance services for steel mills and heavy industry. Builds and maintains blast furnaces (approximately 100m tall), coke ovens (approximately 150m long), converters, and heating furnaces operating in environments exceeding 1,500°C. Work requires millimeter-level precision and serves major Japanese steel manufacturers including Nippon Steel Corporation and JFE Steel Corporation.
• Pietro Restaurant Franchise (レストラン事業) Restaurant franchise operation under the Pietro brand, a pasta-focused restaurant chain. The company operates two locations: AEON Mall Omuta and Yume Town Hamanasu, serving individual consumers pasta dishes and related casual dining fare.

Quantifiable outcome

• Nearly 100% qualification rate for Level 1 and Level 2 furnace construction skill certification exams
• +2 more outcomes

Named customers8 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered core.

• 株式会社ヤマサキホールディングス (Yamasaki Holdings Corporation)coreOthers · 1 January 2018Yamasaki Holdings is the 100% parent company of Yamasaki Corporation, established in 2018 as a holding company structure. The holding company also owns Tamana Country Club, Yamazaki Plant, Tokyo Building Seibi, and other subsidiaries.
• ピエトロ (Pietro)coreChannel Partner/ Reseller/ Distributor · 1 January 2011Pietro is a pasta restaurant chain originating from Fukuoka Tenjin in 1980. Yamasaki operates two Pietro franchise restaurants at shopping malls (AEON Mall Omuta and Yume Town Hamanasu). The franchise agreement began in 2011 when Yamasaki started its restaurant franchise business.

Scale indicators7 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• Nippon Steel Engineering Co., Ltd. Engineering subsidiary of Nippon Steel Corporation providing construction, equipment, and maintenance services for steelmaking facilities. Comparable as an in-house engineering provider to Yamasaki's largest customer, representing both a potential collaboration partner and competitive threat for furnace construction work.
• RHI Magnesita N.V. Global leader in refractory products and solutions for steel, cement, and glass industries. Comparable as a large-scale refractory supplier and installer with similar high-temperature industrial applications; represents the global incumbent against which Yamasaki competes for international furnace construction work.
• JFE Engineering Corporation: Engineering subsidiary of JFE Steel Corporation providing plant construction and equipment for steel, energy, and environmental sectors. Comparable as the captive engineering arm of Yamasaki's other anchor customer with capability overlap in furnace and steel mill facility construction.

Regional players

• HarbisonWalker International: North American refractory manufacturer and installation services provider serving the steel industry. Comparable as a regional specialty furnace contractor with similar blast furnace and steel mill refractory expertise but operating primarily in a different geographic market.

Direct peers

• Krosaki Harima Corporation: Leading Japanese refractory manufacturer serving the steel industry with materials for blast furnaces, ladles, and torpedo cars. Comparable as a specialized supplier to Japanese integrated steelmakers with similar customer base (Nippon Steel, JFE Steel) and overlapping domain expertise in high-temperature materials.
• TYK Corporation: Japanese refractory products manufacturer focused on steel industry applications including blast furnaces and continuous casting. Comparable as a specialized industrial supplier to Japanese steelmakers with adjacent material science and high-temperature process expertise.
• Taikisha Ltd. Japanese industrial plant engineering contractor specializing in paint shops, environmental facilities, and industrial HVAC systems. Comparable as a Japanese specialty industrial plant contractor serving heavy industry clients with similar project-based B2B engineering services.
• Shinagawa Refractories Co., Ltd. Major Japanese refractory manufacturer supplying steelmaking facilities. Comparable as a long-established refractory specialist serving the same customer base; Yamasaki is already a customer/partner of Shinagawa, demonstrating the close adjacency of the businesses.
• Chugai Ro Kogyo Kaisha, Ltd. Japanese industrial furnace and heating furnace manufacturer specializing in heat treatment and metal processing equipment. Comparable as a Japanese furnace engineering specialist serving steel and non-ferrous metal industries with overlapping customer relationships.

Others

• Dai Nippon Toryo Co., Ltd. Japanese industrial coatings manufacturer and plant construction services provider. Comparable as an adjacent industrial services company serving steel mills and heavy industry with complementary maintenance and construction capabilities rather than direct furnace construction competition.

Market position

Strengths5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries11 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 Yamasaki Corporation