Sanyu

What Sanyu does

Sanyu Co., Ltd. (株式会社サンユウ) is a Japanese steel secondary processing manufacturer founded in 1957 and headquartered in Hirakata City, Osaka Prefecture. The company specializes in centerless grinding (みがき棒鋼 / polished steel bars), peeling (切削), and cold drawing (冷間引抜) of steel bars and wire, producing over 1,600 different product types across carbon steel, alloy steel, free-cutting steel, and stainless steel grades in round, hexagonal, square, and flat shapes. Sanyu operates three manufacturing facilities in Japan — Hirakata Factory (4,500 tonnes/month), Yao Factory (5,500 tonnes/month), and Kyushu Factory — with two consolidated subsidiaries (Daido Migaki Steel Industries in Hiroshima and Osaka Migaki in Osaka) adding to total group capacity exceeding 10,000 tonnes monthly.

The company's customer base is concentrated in the automotive industry (precision shafts, cold forging wire for bolts/nuts, powertrain and chassis components), construction and agricultural machinery (hydraulic/pneumatic cylinder rods, press dies), and precision machinery / OA equipment (high-precision shafts for printers, copiers, and rotating machinery). Go-to-market is a direct enterprise field sales model through regional sales offices in Hirakata, Yao, Higashiosaka, and Kyushu, supplemented by regional specialty dealers and a network of automated warehouses holding over 6,600 tonnes of polished steel bar and cold forging wire inventory for rapid just-in-time delivery. Pricing is quote-based per order, negotiated against steel grade, dimensional specifications, and volume. Nippon Steel Corporation holds a 33.67% strategic stake, anchoring raw material supply.

For FY2026 (March 2026), Sanyu reported consolidated revenue of ¥25,572 million and standalone revenue of ¥20,581 million, with EPS of ¥101.22 representing a recovery from ¥74.6 in FY2025 and ¥64.0 in FY2024. The company maintains ISO 9001 (since 2001) and ISO 14001 (since 2006) certifications, holds the largest market share for polished steel bars and cold forging wire in the Kansai region, and is listed on the Tokyo Stock Exchange Standard Market under ticker 5697.

Name

Sanyu

Legal name

株式会社サンユウ (SANYU CO.,LTD.)

Website

https://sanyu-cfs.co.jp

Company type

Public

Founded year

1957

Operating status

Operating

Headcount range

251–500 employees

Short description

Sanyu Co., Ltd. is a Japanese steel secondary processing manufacturer (founded 1957) specializing in centerless grinding, peeling, and cold drawing of precision steel bars and cold forging wire for automotive, construction machinery, agricultural, and precision machinery OEMs across Japan.

Ownership category

akta.pro rank

Product category

Precision Steel Manufacturing

NAICS

Iron and Steel Mills and Ferroalloy Manufacturing (3311)

akta.pro primary industry

Specialty & Alloy Steel (Stainless, Tool Steel, Electrical Steel, High-Strength/HSLA) (IMAKABAJ)

Keywords

• Precision steel bars
• Cold forging steel wire
• Stainless steel bars
• Steel secondary processing
• Centerless ground steel

Headquarters

HQ city

Hirakata

HQ country

Japan

HQ region

Asia

Offices7 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. Polished Steel Bar Manufacturing and Sales (みがき棒鋼): Manufacture and sale of centerless-ground, peeled, and cold-drawn steel bars in various steel grades (carbon steel, alloy steel, free-cutting steel, stainless steel) and shapes (round, hexagonal, square, flat). Used in automotive, construction machinery, agricultural equipment, OA machinery, and precision machine components. Consolidated revenue: ¥25,572 million (FY2026 March).
2. Cold Forging Steel Wire Manufacturing and Sales (冷間圧造用鋼線): Manufacture and sale of cold forging steel wire (SWCH series, boron steel, alloy steel) used for bolts, nuts, rivets, screws, and cold forging components for automotive and industrial applications.
3. Stainless Steel Bar Sales: Stainless steel bars in peeled, centerless-ground, and hexagonal/square/flat forms, primarily in SUS303, SUS304, SUS316 grades, used in precision machinery and industrial applications.
4. General Steel Sales: Sale of general steel materials incidental to the company's primary operations.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels4 records

Core offering

Sanyu is a precision steel secondary processing manufacturer specializing in centerless grinding, peeling, and cold drawing of steel bars and wire. The company produces bright steel bars (みがき棒鋼), cold forging steel wire (冷間圧造用鋼線), and stainless steel bars in carbon, alloy, free-cutting, and stainless steel grades across round, hexagonal, square, and flat shapes. Its products are supplied as base materials to automotive, construction machinery, agricultural equipment, and precision machinery manufacturers across Japan.

Product overview

Sanyu is a manufacturer of bright steel bars and cold-forging steel wire, serving as a secondary processing specialist for steel materials. The company operates three core product lines: みがき棒鋼 (Bright Steel Bars) for precision shaft applications, 冷間圧造用鋼線 (Cold-Forging Steel Wire) for fastener and automotive component production, and ステンレス鋼棒 (Stainless Steel Bars) for corrosion-resistant applications. With over 1,600 product varieties, the company supplies materials to automotive, construction machinery, agricultural equipment, and industrial machinery manufacturers across Japan.

Differentiator

Problem solved

Functional benefit

Products and services

• Bright Steel Bars (みがき棒鋼) Surface-finished steel bars with high dimensional accuracy and smooth finish, available in carbon steel, mechanical structural carbon steel, free-cutting steel, and alloy steel grades. Shapes include round (3.0-140.0mm), hexagon (6.0-115.0mm), square (4.0-200.0mm), and flat bars. Used in automobile parts, construction machinery, hydraulic/pneumatic equipment, and industrial machinery shafts.
• Cold-Forging Steel Wire (冷間圧造用鋼線) Steel wire specifically designed for cold forging processes, including carbon steel wire (SWCH series), boron steel wire, and alloy steel wire in round (4.0-36.0mm), hexagon (6.0-32.0mm), and square shapes. Primary material for manufacturing bolts, nuts, rivets, screws, and cold-forged automotive components.
• Stainless Steel Bars (ステンレス鋼棒) Stainless steel bars available in multiple processing methods: peeled (16.0-150.0mm round), polished (3.0-60.0mm round with h9 tolerance), centerless ground (3.0-60.0mm round with h7 tolerance), and hexagonal/square/flat/pickled variants. Grades include SUS303, SUS304, SUS316, and SUS403 in standard lengths of 2,000-6,000mm. Used in precision machinery, medical devices, food processing equipment, and chemical plants.
• General Steel Materials Sales (一般鋼材の販売) Sale of general steel materials incidental to the company's primary operations, providing customers a complementary supply source alongside processed precision steel products.

Quantifiable outcome

• Monthly production capacity exceeding 10,000 tonnes across Hirakata (4,500t) and Yao (5,500t) factories
• +3 more outcomes

Named customers6 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

Feature5 records

Partnerships

Four partnerships are on record, tiered core and significant.

• Nippon Steel Corporation (日本製鉄株式会社)coreTechnology or Integration · 1 January 2008Nippon Steel is a major shareholder (33.67% stake as of June 2026) and key raw material supplier to Sanyu. Sanyu sources steel materials from Nippon Steel's advanced manufacturing facilities, which provide steel with consistent chemical composition and mechanical properties. The relationship includes third-party capital allocation in 2008 and ongoing strategic cooperation.
• Nippon Steel Materials (日鉄物産株式会社)significantChannel Partner/ Reseller/ DistributorFourth largest shareholder with 4.14% stake (250,000 shares). Functions as a distribution channel for Nippon Steel group products.
• Osaka Migaki Co., Ltd. (大阪ミガキ株式会社)coreStrategic or Co-development Partner72.4% owned subsidiary acquired in 2018 through share purchase. Specializes in polished steel bar manufacturing, expanding Sanyu's production capacity and market reach in the Kansai region.
• Daido Migaki Steel Industries Co., Ltd. (大同磨鋼材工業株式会社)coreStrategic or Co-development Partner100% owned subsidiary acquired in 2011 through share purchase. Headquartered in Hiroshima, specializing in polished steel bar manufacturing, extending Sanyu's geographic footprint to the Chugoku region.

Scale indicators9 records

Recent moves11 records

Expansion highlights6 records

Broad incumbents

• Daido Steel: Major Japanese specialty steel manufacturer producing tool steel, stainless steel, and alloy steel bars/wire. Overlaps with Sanyu in stainless and alloy steel bar supply to automotive and industrial machinery customers across Japan.
• Nippon Steel Corporation: Japan's largest integrated steelmaker and Sanyu's largest shareholder (33.67%) and primary raw material supplier. Nippon Steel produces upstream steel that Sanyu further processes, and also operates downstream bar/wire capabilities, making it a partial vertical competitor and a strategic anchor.
• Voestalpine AG: Austrian specialty steelmaker with significant bright steel bar and cold forming wire operations serving European automotive and industrial customers. Comparable in secondary processing capabilities and product portfolio, though operating in a different geography.
• Kobe Steel (Kobelco): Major Japanese diversified steelmaker producing alloy steel bars, wire rod, and stainless steel products with broad industrial and automotive customer base. Overlaps with Sanyu in alloy/stainless bar and wire segments, though much broader in scope.
• Shanghai Baosteel Industry / Baowu Steel Group: China's largest steelmaker with comprehensive specialty steel bar and wire rod production capacity serving global automotive and industrial markets. Represents the scale-driven competitive threat to Japanese specialty processors like Sanyu, particularly in cost-sensitive segments.

Direct peers

• Aichi Steel Corporation: Japanese specialty steelmaker (Toyota Group) producing stainless steel, alloy steel, and specialty bar/wire products for automotive and industrial applications. Directly comparable to Sanyu in product mix and customer base within Japan.
• Sanyo Special Steel: Japanese producer of special steel bars and wire rod with strong automotive and bearing industry focus. Comparable in product portfolio (alloy/stainless steel bars, cold heading wire) and target markets to Sanyu.
• Daido Kogyo (Daido Group): Japanese manufacturer of alloy steel, stainless steel bars and wire products serving automotive, construction machinery, and industrial sectors. Direct competitor to Sanyu in the bright bar / cold forging wire segments.
• Ovako AB: European specialty steel producer focused on engineering steel bars (bright bars) and seamless tubes for automotive, heavy machinery, and bearing applications. Closely comparable to Sanyu in product type (precision-finished steel bars) and end markets, though operating in EMEA.

Regional players

• SeAH Steel Corporation: Korean specialty steel manufacturer producing stainless and alloy steel bars/wire for automotive and construction. Comparable in product category but primarily serves Korean and export markets, not directly overlapping with Sanyu's Japan-centric business.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks4 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sanyu-co-ltd

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 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 Sanyu