What Nittoh does

NITTOH Co., Ltd. (株式会社NITTOH) is a Nagoya-headquartered, publicly listed Japanese construction and housing maintenance company founded in April 1973 (originally as Sun Interior Co., Ltd.). Listed on the Nagoya Stock Exchange (Main Market) since 2000 with registered capital of approximately ¥186 million, the company operates a multi-business platform organized around three integrated divisions: Construction Works (リフォーム/renovation, 新築/new wooden home construction under the Seven House sub-brand, リニューアル工事/renewal, 設備工事/equipment installation including floor heating and HVAC, 防水/waterproofing, and 不動産/real estate brokerage), Housing Maintenance (the company's original termite prevention business, underfloor damp-proofing, pest and animal extermination, landscaping, and house cleaning), and Building Maintenance (delivered through wholly-owned subsidiary Billwork Co., Ltd., which includes cleaning management, equipment management, exterior wall diagnostics, and what the company describes as the industry's largest window cleaning operation).

The company serves a dual customer base spanning Individual Homeowners (via 8 retail "Deare" reform shops and direct sales) and Non-Residential Buildings (nursing facilities, hotels, commercial stores served through a network of 12 branch offices across Chubu, Kanto, Kansai, Hokuriku, and Koshinetsu regions). It generates revenue through a mix of one-time project-based construction contracts and recurring maintenance subscriptions, with group consolidated annual revenue of approximately ¥11 billion (110億円) and standalone revenue of approximately ¥9 billion (90億円), supported by 439 group employees (246 at the parent company). Distribution is exclusively through its domestic branch-and-retail network — no digital channels, APIs, or proprietary technology platforms are disclosed.

Strategically, NITTOH has expanded into adjacent verticals through inorganic moves — the 2009 establishment of Japan Housing Seismic Reinforcement Co., Ltd. (55%-owned JV) to address Japan's earthquake retrofit demand, the addition of solar power and battery installation services for the renewable energy transition, and ongoing investment in its Dow Chemical Sentricon-certified termite elimination franchise. Its core differentiator is one-stop lifecycle coverage of the building envelope — from construction and renovation through long-horizon maintenance and pest management — a positioning that trades scale for breadth and customer-stickiness across the 50+ year operating history.

Name

Nittoh

Legal name

株式会社NITTOH (登記名 ニットー)

Website

https://nittoh-info.co.jp

Company type

Public

Founded year

1973

Operating status

Operating

Headcount range

251–500 employees

Short description

NITTOH Co., Ltd. is a Nagoya-listed Japanese construction and housing maintenance company founded in 1973 that delivers one-stop building lifecycle services — renovation, new wooden home construction, termite prevention, pest control, waterproofing, and building maintenance — to individual homeowners and non-residential buildings across Japan via 12 branch offices and 8 Deare reform shops.

Ownership category

akta.pro rank

Product category

Construction and Building Maintenance Services

NAICS

Residential Remodelers (236118), New Single-Family Housing Construction (except For-Sale Builders) (236115)

SIC

General Bldg Contractors - Residential Bldgs (1520), Operative Builders (1531)

akta.pro primary industry

Small Exterior Repairs (Trim, Fascia, Soffit, Siding Patches) (HSAGAAAJ)

akta.pro secondary industries

Foundation/Basement Moisture & Sump Pump Check (HSAGAOAK), Vikane/Sulfuryl Fluoride Fumigation Services (HSAMAIAF)

Keywords

• Construction services
• Home renovation
• Building maintenance
• Pest control
• Waterproofing services

Headquarters

HQ city

Nagoya

HQ country

Japan

HQ region

Asia

Offices20 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Infrastructure, Others

Revenue model

1. Construction Services: One-time project-based revenue from construction, renovation, renewal, and equipment installation services for residential and non-residential buildings
2. Housing Maintenance Services: Recurring maintenance services including termite prevention, damp prevention, pest control, and house cleaning
3. Real Estate: Property sales and brokerage services
4. Building Maintenance: Building cleaning and management services via subsidiary Bill Work

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Nittoh is a Japan-based construction and housing maintenance company providing residential reform/renovation, new wooden home construction, renewal construction, equipment installation, waterproofing, and real estate services, alongside housing maintenance offerings such as termite extermination, underfloor damp-proofing, pest control, landscaping, and house cleaning. Building maintenance for non-residential facilities is delivered through its group subsidiary Billwork Co., Ltd. The company operates a network of regional branch offices and retail reform shops ("Deare") serving both individual homeowners and commercial clients such as nursing facilities, hotels, and stores.

Product overview

NITTOH operates as a construction and housing maintenance company with a multi-business portfolio architecture. The core construction division includes reform/renovation services (デールブランド), new wooden house construction (セブンハウス brand), equipment installation, waterproofing, and real estate services. The housing maintenance division provides termite extermination (the company's original business founded in 1973), underfloor damp-proofing, pest control, landscaping, and house cleaning services. Building maintenance is handled through subsidiary 株式会社ビルワーク. The company also offers personal consumer services under the デール brand for home reform and the セブンハウス brand for new home purchases, along with solar power and battery installation services.

Differentiator

Problem solved

Functional benefit

Products and services

• Reform and Renovation Services Reform, renovation, repair, and home extension services for existing residential buildings and individual customers seeking to upgrade their homes.
• New Wooden Home Construction (Seven House) Custom-built wooden residential homes with emphasis on design and quality, promoting wood-based living for individual homebuyers.
• Renewal Construction Services Large-scale building renewal and renovation services for non-residential facilities (nursing facilities, hotels, commercial stores) to maintain and enhance building asset value.
• Equipment Installation Services Installation and management of floor heating, air conditioning, utility systems, solar power generation, and storage battery equipment for residential and commercial buildings.
• Waterproofing Construction Services Waterproofing construction services for buildings to prevent water damage, leaks, and related structural deterioration.
• Real Estate Services Real estate sales, brokerage, and property management services for individual and commercial clients.
• Termite Extermination Services Termite prevention and extermination services for wooden residential structures, serving as the company's foundational and core competence.
• Underfloor Damp-proofing Services Moisture control and damp prevention services for underfloor areas to protect wooden structural elements from decay.
• Pest and Animal Control Services Professional pest and animal control services for residential properties, including insect, rodent, and harmful animal extermination.
• Landscaping and Ground Preparation Services Landscaping management and site preparation services for residential and commercial properties.
• House Cleaning Services Professional residential house cleaning services.
• Building Maintenance Services Commercial building maintenance services including cleaning management, equipment management, and exterior wall diagnostics, operated through group subsidiary Billwork Co., Ltd.
• Solar Power and Battery Installation Services Solar power generation system and storage battery installation services for residential and commercial properties, part of renewable energy offerings.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Three partnerships are on record, tiered minor and core.

• 日本住宅耐震補強株式会社 (Japan Housing Seismic Reinforcement Co., Ltd.)minorStrategic or Co-development Partner · 1 January 2009Joint venture established in 2009 with 55% ownership by NITTOH, focused on housing seismic reinforcement business. Represents strategic expansion into seismic reinforcement services.
• セブンハウス株式会社 (Seven House Co., Ltd.)coreOthers · 1 January 2007Group subsidiary acquired in 2007 for new housing sales business. Later merged into NITTOH in 2016.
• 株式会社ビルワーク (Bill Work Co., Ltd.)coreOthers · 1 January 2003Group subsidiary acquired in 2003, specializing in building maintenance services including cleaning, equipment management, exterior wall diagnosis, and waterproofing. The company develops highly skilled technicians and operates the industry's largest window cleaning business.

Scale indicators6 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Duskin Co., Ltd. Japan's leading franchise-based cleaning and maintenance services company serving both residential and commercial customers. Highly comparable to NITTOH's recurring maintenance revenue model (termite, damp, pest, cleaning) and franchise/branch distribution model.
• REPLUS Co., Ltd. Renovation-focused Japanese company with a franchise chain of home renovation stores. Comparable to NITTOH's 'Deare' reform shops and core renovation business, though more specialized in renovation rather than full lifecycle services.
• Anabuki Construction Inc. Regional Japanese construction company combining new home construction, renovation, and real estate operations. Comparable to NITTOH's multi-service model and similar mid-cap size, though more concentrated in the Shikoku region.

Broad incumbents

• Daiwa House Industry Co., Ltd. Largest Japanese homebuilder and one of the world's largest construction companies. Operates across new construction, renovation, real estate, and broader building services — overlapping with NITTOH's portfolio but at vastly greater scale and broader geographic scope.
• Misawa Homes Co., Ltd. Established Japanese homebuilder offering new construction, renovation, and home maintenance services. Similar multi-service positioning to NITTOH but with national brand presence and larger scale.
• LIXIL Corporation: Japan's largest building materials and housing products company. While primarily a manufacturer (windows, kitchens, bathrooms), LIXIL competes with NITTOH's equipment installation and renovation businesses through its brand strength and product ecosystem.
• Panasonic Homes Co., Ltd. Major Japanese homebuilder with comprehensive construction and renovation services. Comparable service breadth to NITTOH but backed by the Panasonic brand and significantly larger corporate resources.
• Sekisui House, Ltd. Major Japanese homebuilder with extensive custom-built and renovation operations. Overlaps with NITTOH's new construction (Seven House) and reform businesses, but with substantially greater scale and brand recognition.

Emerging players

• Sanwa Holdings Corporation: Mid-cap Japanese construction services group focused on commercial interior fit-out, renovation, and maintenance. Comparable to NITTOH's building maintenance (Billwork subsidiary) and renewal businesses from a non-residential services perspective.
• Earth Corporation: Major Japanese manufacturer of household insecticides and pest control products. Comparable to NITTOH's termite prevention and pest control services from a product-adjacency perspective, though Earth primarily manufactures rather than provides on-site services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/nittoh

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Subsidiaries3 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 Nittoh