Building Net

What Building Net does

Building Net Co., Ltd. (株式会社ビルネット) is a Tokyo-headquartered comprehensive building management services company and a wholly-owned subsidiary of Kyoritsu Maintenance Co., Ltd., which is listed on the Tokyo Stock Exchange Prime Market. Founded in 1960 as a leasing business, the company shifted into facility management after entering the former Nissan Motor Group in the late 1960s and was reorganized under Kyoritsu Maintenance in 2001; it has since grown into a nationwide operator running approximately 2,300 facility management contracts from eight regional branches covering Hokkaido, Tohoku, Kanto/Koshinetsu, Chubu, Kansai, Chugoku/Shikoku, and Kyushu, with a workforce of 919 employees as of March 31, 2026 and FY March 2026 revenue of 22.2 billion JPY.

The company offers six integrated service lines: equipment management (24/7 on-site operations, emergency response, and FM-database-driven preventive maintenance), cleaning (including the proprietary ESM Catalyst Water system and hotel/hospital sanitation), security (reception, patrol, standing guard, and disaster-prevention center monitoring), construction and renovation (seismic reinforcement, IT upgrades, fire prevention, and rebuilds), building management, and office rental / property management for owners. Its primary proprietary technology is ESM Catalyst Water, an OH-radical catalytic cleaning solution that decomposes dirt, bacteria, and odor without chemical detergents; the underlying device is protected by Japan Patent No. 7376196, registered in October 2023.

Building Net generates revenue primarily through recurring managed-services contracts across its core service lines, supplemented by project-based professional services for construction and renovation work. Pricing for facility services is generally quoted on a contact basis; the ESM Catalyst Water product is sold either by subscription (18,000 JPY/month rental with a one-year contract) or as a one-time purchase (450,000 JPY per unit plus consumables). Customers are distributed across six primary verticals — student and corporate dormitories, hotels and resorts, offices and commercial facilities, schools, public facilities, senior housing, and bathhouse/hot-spring facilities — with named reference customers including Kanda Myojin, Waseda's Nakano International Community Plaza (WISH), La Vista Tokyo Bay, Dormy Takao, and Otaya Onsen Myojin no Yu. The company also benefits from intra-group referrals from Kyoritsu Maintenance, particularly for dormitory and hotel management, though in July 2026 it transferred its own dormitory business (ドミール事業) back to the parent, refocusing on its core facility management operations.

Name

Building Net

Legal name

株式会社ビルネット

Website

https://builnet.co.jp

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Building Net is a Japanese comprehensive building management company and wholly-owned subsidiary of TSE Prime-listed Kyoritsu Maintenance, providing equipment management, cleaning, security, construction/renovation, and property management services to roughly 2,300 facilities nationwide across offices, hotels, dormitories, and public venues.

Ownership category

akta.pro rank

Product category

Facility Management Services

NAICS

Commercial and Institutional Building Construction (236220)

SIC

Operators Of Nonresidential Buildings (6512)

akta.pro primary industry

Office & Corporate Building Construction (IMAFACAA)

akta.pro secondary industry

Helpdesk & Service Request Coordination (FM Call Handling/Dispatch) (BPABAEAI)

Keywords

• Building management services
• Facility maintenance
• Commercial cleaning
• Property management
• Security services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. 設備管理事業: Equipment maintenance and management services for buildings including electrical systems, plumbing, elevators, and fire safety equipment. Services include 24-hour emergency response, regular inspections, and facility management database systems.
2. 清掃事業: Building cleaning services ranging from daily office cleaning to specialized hotel and hospital sanitation management. Includes the proprietary ビルネットクリーニングシステム and ESM Catalyst Water services.
3. 警備事業: 24-hour security services including patrol, standing guard, surveillance center monitoring, and access control for office buildings, public facilities, and commercial properties.
4. 建設・リニューアル事業: Construction and renovation services including seismic reinforcement, renovation, and rebuilding projects from planning through construction.
5. 賃貸事業: Property management and rental services including tenant management, lease contracts, and property maintenance to maximize cash flow for property owners.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Building Net is a comprehensive building management services company in Japan that provides integrated facility management including equipment management, cleaning, security, construction and renovation, and property/lease management. The company manages approximately 2,300 facilities nationwide through 8 regional branches, serving offices, hotels, dormitories, schools, public facilities, and senior residences. It also offers ESM Catalyst Water, a patented OH-radical cleaning technology, as a proprietary solution.

Product overview

Building Net is a comprehensive building management services company offering integrated facility services. The company provides six core service lines: Equipment Management (設備管理), Cleaning (清掃), Security (警備), Construction & Renovation (建設・リニューアル), Building Management (ビル経営), and Office Rental/Property Management (オフィス賃貸). Additionally, they offer ESM Catalytic Water (ESM触媒水), a patented cleaning solution using OH radical technology. The services are delivered through a nationwide network of 8 branches managing approximately 2,300 facilities across Japan, serving diverse property types including offices, hotels, dormitories, schools, and public facilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Equipment Management Services (設備管理事業) Comprehensive facility maintenance including 24-hour on-site staff deployment, emergency response, preventive maintenance, and facility management database systems covering electrical systems, plumbing, elevators, and fire safety equipment. Serves building owners and property managers across Japan.
• Cleaning Services (清掃事業) Building cleaning services including daily office cleaning, sanitization, special cleaning for glass and building exteriors, pest control, landscaping, hotel/hospital hygiene management, and bed-making. Targets commercial offices, hotels, hospitals, and dormitories.
• Security Services (警備事業)

Quantifiable outcome

• エネルギー消費コスト削減率61%達成（ドーミー高尾事例）
• +2 more outcomes

Named customers5 records

Segments7 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Three partnerships are on record, tiered core and flagship.

• 株式会社共立ライブネットcoreOthers · 1 August 20102010年8月にビルネットへ統合。レジデンス·sPM사업을 확대。
• 株式会社セントラルビルワーク (CBW)coreOthers · 1 January 2007ビルネットの完全子会社。建築物維持管理に関する一切の業務·s衛生用消耗品類他の販売業務を営業。代表取締役：武井将昭。
• 共立メンテナンス株式会社flagshipOthers · 1 March 2001東証プライム上場企業。ビルネットの親会社でありグループリーダー。ホテル·s寮·sシニアイホーム等の施設運営を行う。ビルネットは共立メンテナンスのグループ会社としてビルメンテナンス部門を担う。1960年創立·s創業60年を迎える 기업。

Scale indicators8 records

Recent moves10 records

Expansion highlights5 records

Direct peers

• Nippon Building Maintenance Co., Ltd. Tokyo-based building maintenance company providing equipment management, cleaning, and security for office and commercial buildings. Closely aligned with Building Net's core service offering and customer segments.
• Mitsubishi Jisho Property Management Co., Ltd. Mitsubishi Estate Group subsidiary managing office buildings and commercial facilities with integrated FM services. Competes head-to-head with Building Net for premium Tokyo office property management contracts.
• Nomura Real Estate Partners Co., Ltd. Subsidiary of Nomura Real Estate Holdings providing building management, cleaning, security, and tenant services across commercial office properties. Direct competitor to Building Net in the Tokyo office and large-facility FM segment.
• Daiwa Lifenext Co., Ltd. Daiwa House Group company specializing in condominium and building management, renovation, and leasing support. Comparable to Building Net in its housing/PM business line and integrated service approach.
• Tokyu Community Co., Ltd. Comprehensive building management and condominium management arm of the Tokyu Group in Japan, offering cleaning, security, equipment management, and renovation services to office, commercial, and residential properties. Closely comparable to Building Net in service mix and target customer profile.
• Asahi Facilities Co., Ltd. Facility management company providing cleaning, security, and equipment management services to commercial and institutional buildings in Japan. Directly comparable to Building Net's integrated FM business model and customer segments.

Broad incumbents

• ALSOK (Sohgo Security Services Co., Ltd.): Major Japanese security provider extending into facility management and building services. Comparable to Building Net's security business line but with national brand recognition and broader service portfolio.
• SECOM Co., Ltd. Largest Japanese security services company with growing FM and building management offerings. Overlaps with Building Net's security and integrated FM services, but operates at significantly greater scale and broader geographic footprint.
• CBRE Group, Inc. Global commercial real estate services firm with a significant facilities management practice in Japan. While much larger and broader in scope, CBRE competes with Building Net for integrated FM contracts in the Japanese commercial property market.
• Duskin Co., Ltd. Public Japanese company offering cleaning services (rental mats, mop products) plus broader facility hygiene and pest control solutions. Overlaps with Building Net's cleaning business line but operates a more standardized, franchised model at greater scale.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 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 Building Net