Taisei Oncho Co

What Taisei Oncho Co does

Taisei Oncho Co., Ltd. (大成温調株式会社), operating under the LIVZON brand, is a Japan-based publicly traded building environmental systems contractor founded in 1951 and now in its 75th fiscal year. The company designs, installs, and maintains three integrated building infrastructure trades — HVAC (空気調和), plumbing and sanitation (給排水衛生), and electrical equipment installation (電気設備工事) — for public and private sector buildings. Its guiding philosophy frames buildings as living entities whose lifetime value is maximized through integrated environmental systems. Customers include municipal governments (e.g., Komatsu Village Office), universities (e.g., Meiji University), and industrial firms (e.g., Sato Kogyo), with project showcase content used as a marketing asset.

The company monetizes through two streams: one-time construction project services for new installations and ongoing maintenance/technical services for installed systems. Go-to-market is direct enterprise field sales targeting public institutions, educational facilities, and commercial building operators across Japan. Distribution is single-country (domestic), with a headquarters in Tokyo and a network of domestic offices and affiliated companies. Marketing is primarily via corporate website, integrated annual reports, sustainability disclosures, and the LIVZON × SPORTS sponsorship program. The company is publicly listed with 6,882,487 shares outstanding and 6,831 shareholders as of March 31, 2026.

Governance is structured around a board with multiple external directors focused on DX promotion, M&A-oriented growth strategy, and audit/nomination/compensation oversight. Recent corporate activity has centered on governance reporting, a corporate site renewal, sustainability partnerships, and sponsorship/community engagement, with no disclosed acquisitions, funding rounds, or international expansion. Source data does not disclose revenue, headcount, or backlog, limiting quantitative assessment.

Name

Taisei Oncho Co

Legal name

大成温調株式会社 (taisei oncho co.,ltd.)

Website

https://taisei-oncho.co.jp

Company type

Public

Founded year

1951

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Taisei Oncho Co., Ltd. (LIVZON) is a Japan-based building environmental systems contractor that designs, installs, and maintains HVAC, plumbing, and electrical infrastructure for public sector, educational, and commercial buildings.

Ownership category

akta.pro rank

Product category

Building Mechanical & Electrical Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Electric Lighting & Wiring Equipment (3640)

akta.pro primary industry

HVAC Installation, Service & Repair (IMAIABAA)

akta.pro secondary industries

HVAC Service, Maintenance & Repair (BPABACAA), HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

Keywords

• Building mechanical services
• HVAC installation
• Plumbing sanitation
• Electrical equipment installation
• Building environmental systems

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction Project Services: Project-based revenue from design, installation, and construction of HVAC systems, plumbing, and electrical infrastructure for buildings. Revenue recognized upon project completion with long project cycles typical of construction industry.
2. Maintenance and Technical Services: Ongoing technical services for installed building environmental systems including inspection, maintenance, and optimization services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Taisei Oncho Co designs, installs, and constructs air conditioning (HVAC), plumbing and sanitation, and electrical equipment systems for buildings under the LIVZON brand. The company provides integrated building environmental solutions for new construction projects and ongoing maintenance services, treating buildings as living entities to maximize their lifelong value through combined MEP disciplines.

Product overview

Taisei Oncho Co operates under the LIVZON brand as a comprehensive building services company. The company provides integrated building systems including air conditioning (HVAC), plumbing and sanitation, and electrical equipment installation. Their services focus on creating safe and comfortable building environments through the installation and maintenance of these core building infrastructure systems. The company positions itself as a '総合たてものサービス企業' (Comprehensive Building Service Company) that maximizes the lifetime value of buildings by treating them as living entities.

Differentiator

Problem solved

Functional benefit

Products and services

• Air Conditioning / HVAC Installation (空気調和) Air conditioning (HVAC) system design, installation, and construction services for buildings, contributing to comfortable indoor environments. Targeted at building owners, government facilities, and commercial/industrial construction projects.
• Plumbing and Sanitation Installation (給排水衛生) Plumbing and sanitation equipment design and installation services for buildings, part of the company's integrated building environmental solutions.
• Electrical Equipment Installation (電気設備工事) Electrical equipment design and installation services for buildings, completing the integrated MEP offering under the LIVZON brand.
• LIVZON Integrated Building Environmental Solutions Comprehensive building services offering combining air conditioning (HVAC), plumbing and sanitation, and electrical equipment installation under one provider. Targets building owners, government facilities, and commercial construction projects seeking integrated environmental solutions.
• Maintenance and Technical Services Ongoing technical services including inspection, maintenance, and optimization of installed building environmental systems for existing clients.

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• うみさんぽ (Umi Sanpo)minorOthersStudent environmental volunteer group supported by the company. Partnership involves supporting their environmental activities as part of corporate social responsibility initiatives. Support contract signed May 1, 2026.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Market position

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/embed/1Md2fSyZoqc
• LinkedInlinkedin.com/company/taisei-oncho-co-ltd-1904-

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments1 record

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Taisei Oncho Co