IG KOGYO

What IG KOGYO does

IG KOGYO Co., Ltd. (アイジー工業株式会社) is a privately held Japanese manufacturer founded in 1970 and headquartered in Higashine, Yamagata Prefecture, specializing in metal exterior building materials. The company manufactures and sells three core product lines: IG Siding (residential metal siding), IG Roof (metal roofing centered on the Super Galutext series), and IG Vand (sandwich panels for non-residential steel structures). Its proprietary technology stack is built around ultra-high durability Galvalume (超高耐久ガルバ) and next-generation SGL steel — aluminum-zinc-magnesium alloy coated coils that deliver corrosion resistance superior to standard Galvalume — combined with polysocyanurate closed-cell foam insulation for thermal performance. The portfolio spans a Simple Modern Series, Natural Series, and Basic Series covering residential new construction, renovation, and commercial/industrial applications, and includes a renovation service brand (IG Reform) and a design panel line (Xium).

The company generates revenue through unit-priced hardware sales of these materials, with premium residential siding SKUs priced at approximately ¥30,000-¥46,000 per tsubo (¥9,000-¥13,500/m²) excluding installation. Distribution runs through 11 regional sales offices covering all of Japan (Hokkaido to Okinawa), a certified contractor network, and building material wholesalers. IG KOGYO's primary customer segments are residential homeowners (new build and renovation), construction professionals (general contractors, exterior contractors, design firms), and non-residential building projects (warehouses, factories, commercial facilities). The firm is led by President and Representative Director Moriyasu Mori, holds 251-500 employees, and is privately held with no disclosed institutional investors, parent company, or funding rounds.

Name

IG KOGYO

Legal name

アイジー工業株式会社 (IG KOGYO Co., Ltd.)

Website

https://igkogyo.co.jp

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

251–500 employees

Short description

IG KOGYO is a privately held Japanese manufacturer of metal exterior building materials, including metal siding (IG Siding), metal roofing (IG Roof), and sandwich panels for non-residential steel structures (IG Vand), serving residential homeowners, contractors, and commercial builders across Japan using proprietary Galvalume steel technology.

Ownership category

akta.pro rank

Product category

Metal Exterior Building Materials

NAICS

Sheet Metal Work Manufacturing (332322)

SIC

Sheet Metal Work (3444)

akta.pro primary industry

Metal Roofing Systems (IMADAFAB)

akta.pro secondary industry

Roof Insulation & Cover Boards (IMADAFAN)

Keywords

• Metal exterior materials
• Metal siding
• Metal roofing
• Sandwich panels
• Building renovation materials

Headquarters

HQ city

Higashine

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Building Material Sales: IG KOGYO generates revenue through manufacturing and selling metal exterior building materials including metal siding (アイジーサイディング), metal roofing (アイジールーフ), and metal sandwich panels (アイジーヴァンド) for residential and non-residential buildings.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels9 records

Core offering

IG KOGYO manufactures and sells metal exterior building materials for residential and non-residential applications, organized into three core product lines: IG Siding (residential metal exterior wall material), IG Roof (metal roofing material led by the Super Galutext series), and IG Vand (metal sandwich panels for steel-framed commercial/industrial buildings). Products are based on proprietary Ultra-High Durability Galvalume and SGL coated-steel technology, supported by polyisocyanurate foam insulation, and are sold through a nationwide network of 11 regional sales offices, professional contractor channels, and building material wholesalers.

Product overview

IG KOGYO is a manufacturer of metal exterior materials for buildings, operating as a unified product portfolio of three core product lines: (1) IG Siding for residential exterior walls, (2) IG Roof for metal roofing, and (3) IG Vand for non-residential steel structure exterior walls. The product portfolio includes sub-brands such as Simple Modern Series, Natural Series, and Basic Series, along with specific product variants like SP-GALNOTE, SP-Galspan, SP-Galbright II, SP-Birect, and SP-Galbow under IG Siding. The Super Galuteq series represents the premium roofing line. The company also offers renovation services under IG Reform and design panels under the Xium brand. Products utilize Galvalume steel technology with heat-reflective and insulation properties.

Differentiator

Problem solved

Functional benefit

Brands

• アイジーサイディング: 住宅向け外壁材（金属サイディング）。耐食性に優れたガルバリウム鋼板を使用した外壁材ブランド。
• アイジールーフ
• アイジーヴァンド
• Xium（ジウム）
• シンプルモダンシリーズ
• スーパーガルテクト
• アイジーリフォーム

Products and services

• IG Siding (アイジーサイディング) — Residential Metal Exterior Wall Material Metal siding for residential exterior walls, available in Simple Modern Series, Natural Series, and Basic Series with multiple textures, colors, and specifications. Backed by 30-year product warranty (from October 2025). Targets homeowners and contractors for new residential construction and renovation of exterior walls.
• IG Roof (アイジールーフ) — Metal Roofing Material

Quantifiable outcome

• Reduces heat penetration through exterior walls by approximately 50% compared to paint-only renovation
• +2 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• ATAS International: US-based manufacturer of metal roofing, wall panels, and accessories for residential and commercial buildings. Smaller and more niche than IG KOGYO but directly comparable as a metal exterior envelope specialist serving contractors and builders.

Direct peers

• KMEW Co., Ltd. Japanese manufacturer of exterior wall materials (siding/ceramic panels) for residential and non-residential buildings. Competes with IG Siding in the same Japan-domiciled exterior cladding category, sharing installer channels and competing for share of new-build and renovation demand.
• Nichiha Corporation: Tokyo-listed Japanese manufacturer of exterior siding and building materials, primarily fiber cement but overlapping with IG in residential exterior walls. Comparable product positioning (siding for new builds and renovations), channels, and downstream customer base in Japan.

Others

• James Hardie Industries: Global leader in fiber cement exterior siding, serving residential and commercial markets. Competes for the same residential exterior wall specification decisions as IG KOGYO but via a different substrate (fiber cement vs. Galvalume steel).
• ArcelorMittal: Global steel and mining giant producing flat steel products including coated steels used in building envelope applications. Not a direct competitor but a key upstream input supplier to the Galvalume-type coated steel industry that IG KOGYO depends on for its SGL technology.

Broad incumbents

• Kingspan Group: Global manufacturer of insulated building envelope products, including insulated metal panels and roofing systems. Comparable product technology (insulated metal sandwich panels akin to IG Vand) and focus on energy-efficient building envelopes, though at much larger global scale.
• LIXIL Corporation: Major Japanese building materials and housing products conglomerate with a wide portfolio including exterior and interior building materials. Larger and more diversified than IG KOGYO, but overlapping at the residential exterior and roofing interface in Japan.
• BlueScope Steel Limited: Australia-headquartered global producer of coated and painted steel products including COLORBOND for roofing and walling. Direct upstream technology overlap (Galvalume/Zincalume coated steel) and downstream overlap in metal building envelope products globally.
• Cornerstone Building Brands: North American manufacturer of metal building components including roofing, wall panels, and insulated metal panels for commercial and residential construction. Comparable metal building envelope product portfolio but operating primarily in the US market.

Regional players

• Tata BlueScope Steel: India-based coated steel manufacturer (Tata/BlueScope joint venture) producing Zincalume and COLORBOND-equivalent roofing and walling products. Comparable coated-steel-based building envelope products but primarily serves India and Southeast Asia rather than Japan.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCHuQpYlJ-0rQMZffH9ulnAA
• Facebookfacebook.com/igkogyo
• Instagraminstagram.com/igkogyo

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 IG KOGYO