What Nittan Valve does

NITTAN Corporation (formerly Nittan Valve Co., Ltd.) is a Japanese automotive parts manufacturer specializing in engine valves, precision forged gears, and valve actuation components. Founded as Okajima Iron Works in 1924 and reorganized into its current legal form in 1948, NITTAN pioneered mass production of engine valves in Japan in 1934 and has supplied the global automotive industry for over 90 years. The company operates 18 production sites across 9 countries (Japan, USA, Poland, China, Taiwan, South Korea, Thailand, Indonesia, Vietnam, India) and serves major automotive OEMs including Toyota, Honda, Nissan, Mazda, Suzuki, Subaru, Hyundai, and Volvo, as well as marine engine manufacturers (Wärtsilä, IHI Power Systems), agricultural machinery makers (Kubota, Yanmar, STIHL), and Tier 1 automotive suppliers (AISIN). NITTAN is publicly listed on the Tokyo Stock Exchange Standard Market (ticker: 6493) with consolidated FY2025 revenue of approximately ¥51.4 billion and 2,549 consolidated employees.\n\nThe company's core technical capabilities center on hot forging, cold sizing (precision forging), hard-facing welding (PTA welding, acetylene gas welding, plasma laser welding), and metal joining/processing. NITTAN holds proprietary sodium-filled hollow valve technology—offering both Umbrella-type and Shaft-type variants—which delivers industry-leading weight reduction and cooling performance in combustion environments exceeding 800°C. The company has also developed the NGV (Next Generation Valve) and New-NGV rationalized manufacturing lines, deployed globally across its facilities since 2010. Development pipeline items under VISION I and VISION II include hydrogen engine valves, xEV reduction gears, FCV electric supercharger components, mirror-finished bottom-surface valves, and hyper hollow valves, signaling a strategic push into electrified and alternative-fuel powertrain adjacencies.\n\nNITTAN generates revenue almost exclusively through direct B2B sales to OEM customers under multi-year supply agreements, with pricing negotiated per product and per customer. The sales-led go-to-market is organized through domestic offices in Hadano, Tokyo, and Nagoya, plus overseas sales subsidiaries in Korea, China, and Taiwan. The Eaton Corporation partnership (since 1978) is foundational: Eaton holds a 17.19% stake, and the two firms jointly operate Nittan Global Tech (51% NITTAN / 49% Eaton) as the global strategy control tower for joint ventures in North America, Europe, Korea, China, and Taiwan. The medium-to-long-term NITTAN Challenge 10 vision targets ¥100 billion in consolidated revenue, ¥10 billion in operating profit, and 10%+ operating margin by FY2030, complemented by a 50% CO2 emissions reduction target (vs. FY2013 baseline) under the NITTAN Carbon Neutral initiative.

Name

Nittan Valve

Legal name

株式会社NITTAN

Website

https://niv.co.jp

Company type

Public

Founded year

1948

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

NITTAN Corporation is a Japanese automotive parts manufacturer specializing in engine valves, precision forged gears, and valve actuation components for global OEMs across automotive, marine, agricultural, and industrial machinery sectors, operating 18 production sites in 9 countries.

Ownership category

akta.pro rank

Product category

Automotive Engine Components

NAICS

Other Engine Equipment Manufacturing (333618), Speed Changer, Industrial High-Speed Drive, and Gear Manufacturing (333612)

SIC

Special Industry Machinery, Nec (3559), General Industrial Machinery & Equipment, Nec (3569)

akta.pro primary industry

Passenger Vehicle Engine Systems Manufacturing (ICE) (IMACAAAF)

Keywords

• Engine valves
• Automotive components
• Precision forging
• Marine engine valves
• Bevel gears

Headquarters

HQ city

Hadano

HQ country

Japan

HQ region

Asia

Offices23 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Small Engine Valve Sales: Manufacturing and sales of small engine valves for automobiles, motorcycles, trucks, buses, and general-purpose products (generators, tillers, mowers). Sold directly to automotive OEMs and engine manufacturers. This is the company's core revenue stream, manufactured at 2 domestic plants and 8 overseas facilities.
2. Marine/Stationary Engine Valve Sales: Manufacturing and sales of large engine valves for ships, power plants, and co-generation systems. Sold to marine and stationary engine manufacturers primarily in Japan and Korea.
3. Precision Forged Gear Sales: Manufacturing and sales of precision forged bevel gears for automotive, truck, agricultural, construction, and industrial machinery. Sold to OEMs and automotive component manufacturers in Japan.
4. Valve Lifter and Roller Rocker Arm Sales: Manufacturing and sales of valve lifters and roller rocker arms through group companies in South Korea and China (Beijing and Shandong Province), primarily sold to automobile OEMs in South Korea, China, and Japan.
5. Machine Tool Sales: Manufacturing and sales of machine tools, primarily supplied to NITTAN group's own small engine valve production sites.
6. Kanade Golf Putter Sales: Sales of premium golf putters under the 'KANADE' brand, leveraging NITTAN's precision forging and deep milling technologies. This is a non-core diversification product.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

NITTAN Corporation manufactures and sells engine valves, valve seats, precision forged bevel gears, and valve lifters/lash adjusters for automotive, motorcycle, marine, stationary power generation, agricultural, and industrial machinery OEMs worldwide. The company also produces machine tools for its group production sites and a small consumer line of KANADE premium golf putters leveraging its precision forging expertise. All sales are conducted B2B under multi-year OEM supply agreements, supported by an 18-site global production footprint.

Product overview

NITTAN Corporation is a manufacturer of engine valves and related mechanical components. The company operates as a group manufacturing and selling engine valves (small engine valves, land & marine engine valves), precision forged gears (bevel gears), valve lifters and lash adjusters, and a consumer product line (KANADE golf putters). The core products utilize NITTAN's proprietary technologies including forging, overlay welding, metal joining, and precision metal processing. The company also develops xEV-related components as part of its NITTAN Challenge 10 strategy.

Differentiator

Problem solved

Functional benefit

Brands

• 奏 (KANADE): A premium forged golf putter product line utilizing precision forging and deep milling technology to achieve a soft feel and sound even in metal, combined with superior straight-line accuracy.
• NITTAN Challenge 10 (NC10)
• NITTAN Carbon Neutral (NCN)

Products and services

• Small Engine Valves (小型エンジンバルブ) Engine valves for automobiles, motorcycles, trucks, buses, and general-purpose engines (generators, tillers, mowers). Includes solid valves, hollow shaft valves, and umbrella hollow valves with sodium-filled cooling. The flagship product line manufactured using forging, overlay welding, and metal processing for direct sale to global automotive OEMs from 2 domestic and 8 overseas plants.
• Land & Marine Engine Valves and Valve Seats (陸舶用エンジンバルブ・弁座) Large engine valves and valve seats for marine engines (ship propulsion) and land-based power generation, including co-generation systems. Features high heat resistance (800°C+), wear resistance, and corrosion resistance for heavy-fuel and gas engine operation in extreme environments. Sold to marine and stationary engine OEMs primarily in Japan and Korea.
• Precision Forged Bevel Gears (精密鍛造かさ歯車/ベベルギア) Precision forged bevel gears, pinion gears, and drive gears for differentials and transmissions in automobiles, trucks, agricultural machinery, construction machinery, and industrial machinery. Produced via combination of hot forging and cold sizing (precision cold forging) combined with tooth profile machining. Sold to Japanese OEMs and automotive component manufacturers (e.g., AISIN).
• Valve Lifters and Lash Adjusters (バルブリフター・ラッシュアジャスター) Valve lifters (tappets), roller rocker arms, and hydraulic lash adjusters (HLA) that control engine valve operation. Roller rocker arms reduce cam contact resistance; the HLA automatically adjusts valve clearance via hydraulic pressure in response to thermal expansion/contraction of engine valves, extending valve life and reducing engine assembly cost. Manufactured and sold primarily by group companies in South Korea and China.
• KANADE (奏) Golf Putter Premium golf putters manufactured using NITTAN's precision forging technology and high-precision deep milling加工. The forged heads with precision milling deliver a soft feel and sound even in metal, with superior straight-line accuracy. A non-core diversification product.

Quantifiable outcome

• Awarded Mazda's Carbon Neutral Improvement Award for 3 consecutive years (2024-2026) for CO2 reduction contributions
• +4 more outcomes

Named customers21 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

Feature13 records

Partnerships

Three partnerships are on record, tiered minor and core.

• Professional caddy Terui Koji (照井浩二氏) and mountain running athlete Ikekami Yuki (池神悠希氏)minorGTM or Marketing Partner · 13 April 2026Individual sponsor support program launched in April 2026 for athletes pursuing personal challenges. These are not product/service partnerships but corporate social engagement programs supporting individuals who embody NITTAN's values of challenging spirit.
• Partner companies in supply chain (domestic and international)coreStrategic or Co-development Partner · 30 January 2026Updated its 'Partnership Building Declaration' (パートナーシップ構築宣言) on January 16, 2026, committing to promoting new partnerships beyond scale and series constraints, and ensuring fair business practices with small and medium subcontractors. This declaration applies to NITTAN's entire supply chain, promoting sustainable and open transaction environments with suppliers.
• Eaton CorporationcoreStrategic or Co-development Partner · 1 January 1978Long-standing technical, capital, and sales partnership established in 1978 with Eaton Corporation, a US-based global company manufacturing vehicle drivetrain, engine, and body components. The partnership has evolved into multiple joint ventures including U.S. Engine Valve (Partnership) in South Carolina, Nittan Euro Tech in Poland, and Nittan Global Tech Co., Ltd. (joint holding company, 51% NITTAN, 49% Eaton). Nittan Global Tech manages NITTAN-Eaton joint ventures across North America, Europe, Korea, China, and Taiwan. In 2025, NITTAN announced the reconsolidation of Shinhwa Precision Co., Ltd. (newly renamed Shinwa Corporation) as a subsidiary, further strengthening Eaton-group coordination. Eaton is also NITTAN's largest shareholder with 17.19% stake (4,947,660 shares held in trust at BNY Mellon).

Scale indicators10 records

Recent moves9 records

Expansion highlights6 records

Broad incumbents

• Eaton Corporation: US-based global manufacturer of vehicle drivetrain, engine and electrical components; NITTAN's strategic partner, largest shareholder (17.19%) and co-investor in multiple engine valve JVs (US Engine Valve Partnership, Nittan Euro Tech, Nittan Global Tech), making Eaton both an internal partner and a broader incumbent competitor in powertrain.
• Schaeffler Group: Large German automotive and industrial supplier with powertrain, valve train and engine components (including INA engine timing, valve train and E-Valve technologies); not a focused engine-valve manufacturer but a much broader incumbent competing for shared OEM wallet.
• Continental AG: Large German Tier-1 automotive supplier with engine, transmission and sensor systems serving global OEMs; broader incumbent with adjacent engine and valve train technologies competing for shared OEM engineering and procurement spend.
• BorgWarner Inc. Global powertrain technology supplier across ICE, hybrid and electric platforms serving the same automotive OEM customer base as NITTAN; offers adjacent and overlapping engine components (including valve actuation systems) as part of a much broader portfolio.

Direct peers

• Nippon Piston Ring Co., Ltd. Japanese manufacturer of piston rings, cylinder liners, valve seat inserts and other engine components serving passenger vehicle and motorcycle OEMs; directly comparable Japanese peer in engine components with overlapping customer base to NITTAN's valve and valve actuation offerings.
• MAHLE GmbH: German Tier-1 automotive supplier with a global engine components portfolio that includes engine valves, valve train components and pistons serving passenger and commercial vehicle OEMs; directly competes with NITTAN for ICE engine-valve sockets at European and global automotive OEMs.
• Howmet Aerospace Inc. Precision components manufacturer specializing in engineered metal products including investment cast and forged components used in engine, airframe and industrial applications; comparable to NITTAN's forging and precision metal processing capabilities across aerospace and engine valve adjacencies.
• TPR Co., Ltd. Japanese manufacturer of automotive pistons, piston rings, cylinder liners and sintered valve seat inserts serving global OEMs; closely comparable to NITTAN's precision forged components and valve actuation components in size, customer base and Japanese-supplier positioning.
• Federal-Mogul (Tenneco Powertrain / DRiV, now part of Apollo-Owned Powertrain operations): Historically the principal global competitor to NITTAN in mass-produced engine valves for ICE passenger vehicles and commercial engines; now distributed across the DRiV/Powertrain operations following the 2022 Tenneco acquisition by Apollo, making it the most directly comparable engine valve competitor worldwide.
• Riken Corporation: Japanese manufacturer of piston rings, valve train components and engine peripherals directly comparable to NITTAN's valve lifter and roller rocker arm offerings; serves overlapping Japanese and global automotive OEMs and competes in adjacent engine component categories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/nittancorporationpr
• LinkedInlinkedin.com/company/nittan-valve-co-ltd

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries20 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 Nittan Valve