izawa, k.k.

What izawa, k.k. does

izawa, k.k. (株式会社イザワ) is a privately held Japanese construction subcontractor founded in July 1990 and incorporated on November 30, 1995, with headquarters in Zama City, Kanagawa Prefecture. The company provides foundation construction services (布基礎 cloth foundations, 深基礎 deep foundations, and 特殊基礎工事 special foundation work), exterior construction (外構工事), and land preparation (宅造工事) for residential builders, along with ancillary services in scaffolding/civil engineering, water facility construction, tile/brick/block work, and paving. The company reports 12,100 cumulative foundation projects and 11,300 cumulative exterior projects, and operates from two Zama-locations: a headquarters in the Sanrich Soubudai building and a separate construction department office.

Revenue is generated entirely through project-based, one-time engagements with Japanese residential construction and architecture firms; the company explicitly lists twelve named enterprise customers spanning major homebuilders (Aoi Construction, AQ Group, Open House Architect, Taisei Housing, Nihon Jutaku Two-by-Four, Ichiken Construction, Hikari Construction, Benhouse, Hawk One, Homeposition) and architectural practices (Agree Urban Design, Global Architect). The disclosed FY2025 (令和7年度) annual revenue is ¥1.64 billion, with operational scale of approximately 600 foundation, 450 exterior, and 100 land-prep projects per year. Pricing is project-by-project, with employee compensation (¥250,000+/month full-time; ¥10,000+/day part-time) publicly disclosed only for hiring purposes.

The company's technology is purely conventional construction execution — no proprietary software, no digital platforms, no AI/data assets, and no patents or trademarks are disclosed. Go-to-market is direct: phone and website contact-form inquiries, supported by an Instagram presence (@_izawa130). The company is led by Representative Director Kobayashi Daichi (小林 大人) and Managing Director Oikawa Shuichi (及川 秀一), holds a Kanagawa Prefecture Governor construction license (般－5 第61477号), maintains relationships with three regional banks, and has registered capital of ¥10 million. Geographic scope is restricted to Kanagawa Prefecture.

Name

izawa, k.k.

Legal name

株式会社イザワ

Website

https://130.co.jp

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

izawa, k.k. is a privately held Kanagawa-based construction subcontractor providing foundation, exterior, and land-preparation services to Japanese residential builders, with 30 employees and FY2025 revenue of ¥1.64B.

Ownership category

akta.pro rank

Product category

Residential Construction Services

NAICS

Foundation, Structure, and Building Exterior Contractors (2381), Poured Concrete Foundation and Structure Contractors (23811), Poured Concrete Foundation and Structure Contractors (238110)

SIC

General Bldg Contractors - Residential Bldgs (1520), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Shallow Foundations & Ground Support (Footings, Rafts, Ground Beams) (IMAFAOAB)

akta.pro secondary industries

Trenching & Utility Excavation (IMAFAKAD), Specialty Access & Scaffolding Rental/Leasing (TLABAFAL), Site Access & Temporary Roads / Working Platforms (IMAFAKAO)

Keywords

• Residential foundation construction
• Exterior construction services
• Land preparation works
• Civil engineering construction
• Special foundation engineering

Headquarters

HQ city

Zama

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Foundation Construction Services (基礎工事): Core revenue from residential foundation construction, including cloth foundations (布基礎), deep foundations (深基礎), and special foundation work. Revenue is project-based and one-time per construction.
2. Exterior Construction Services (外構工事): Exterior construction work for residential properties, generating project-based one-time revenue.
3. Site Preparation Services (宅造工事): Residential site preparation work, contributing to project-based revenue.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

izawa, k.k. provides residential foundation, exterior, and land development construction services in Kanagawa Prefecture, Japan. Its core offerings cover cloth foundations, deep foundations, special foundation construction, exterior construction, and site preparation, with ancillary capabilities in scaffolding/civil engineering, water facilities, tile/brick/block work, and paving. Services are delivered on a per-project basis primarily to residential builders and developers.

Product overview

izawa, k.k. is a construction services company offering a unified portfolio of foundation and exterior construction services for residential buildings. The core offerings include foundation work (基礎工事) with cloth and deep foundation capabilities, special foundation work (特殊基礎工事), exterior construction (外構工事), and land preparation (宅造工事), supported by ancillary services in scaffolding/civil engineering, water facilities, tile/brick/block work, and paving. With over 12,100 foundation projects and 11,300 exterior construction projects completed, the company primarily serves the Kanagawa Prefecture residential construction market.

Differentiator

Problem solved

Functional benefit

Products and services

• Foundation Construction Work (基礎工事) Residential foundation construction services including cloth foundations (布基礎), deep foundations (深基礎), high-ground foundation operations, and crane arrangement (レッカー手配) for wooden residential buildings. Targeted at residential construction companies.
• Special Foundation Construction (特殊基礎工事) Specialized foundation construction for non-standard or complex foundation requirements in residential building projects.
• Exterior Construction Work (外構工事) Exterior construction work for residential properties performed according to customer requirements, including exterior structures and landscaping elements. Targeted at residential builders and developers.
• Land Preparation Work (宅造工事) Residential land preparation and development services, contributing approximately 100 projects annually to the company's production capacity.
• Scaffolding and Civil Engineering (とび・土木事業) Scaffolding and civil engineering services supporting residential construction projects.
• Water Facility Construction (水道施設工事業) Water facility construction services supporting residential and small-scale infrastructure projects.
• Tile, Brick, and Block Work (タイル・レンガ・ブロック業) Tile, brick, and block installation services for residential buildings.
• Paving Construction (舗装工事業) Paving and road construction services supporting residential site development.

Named customers12 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators6 records

Recent moves1 record

Expansion highlights3 records

Broad incumbents

• Raito Kogyo Co., Ltd. Listed Japanese specialty contractor focused on foundation engineering, ground improvement, and slope stabilization. Comparable in core foundation work, though serves a much broader geography and project scale than Izawa.
• Japan Pile Corporation: Largest specialized foundation/piling contractor in Japan. Directly overlaps with Izawa's foundation engineering services but operates nationally and at significantly larger scale across civil and building projects.
• Nippon Kiso Gijutsu Co., Ltd. Japanese specialty foundation and ground engineering contractor offering piling, ground improvement, and foundation work. Comparable core service overlap with Izawa's foundation business at much larger national scale.
• Fudo Construction Co., Ltd. Japanese foundation and geotechnical engineering firm specializing in piling and ground improvement. Overlaps with Izawa's foundation engineering services across residential and commercial projects.

Emerging players

• Jibannet Holdings Co., Ltd. Listed Japanese firm providing foundation inspection, ground assessment, and geotechnical services adjacent to residential construction. Comparable in being foundation-focused but operates in services/data rather than contracting execution like Izawa.

Regional players

• Odakyu Construction Co., Ltd. Tokyo/Kanagawa-region general contractor with residential construction and renovation work. Comparable customer base overlap with Izawa in the Kanagawa residential market, though broader in scope.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• Instagraminstagram.com/_izawa130?igshid=YmMyMTA2M2Y=

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 izawa, k.k.