Sun Co.

What Sun Co. does

Sun Co. (株式会社サン) is a privately held Japanese building maintenance company founded in 1970 and headquartered in Shizuoka-shi, Japan. The company provides integrated facility management services spanning cleaning, equipment/facility management, security, and disinfection/antibacterial environmental management, alongside designated management of public facilities and condominium management. It serves a diversified vertical mix including office buildings, commercial facilities, hotels, hospitals, condominiums, airports, and senior care facilities across the Chubu and Kanto regions of Japan, operating from 8 physical office locations in Shizuoka, Fujieda, Hamamatsu, Mishima, Fuji, Tokyo, Kanagawa, and Nagoya.

The business model is predominantly B2B recurring facility maintenance contracts acquired through direct sales, RFP responses, and public tenders, supplemented by designated management of public-sector facilities. The company has also built a wellness business division (Sun Wellness) focused on sports promotion and health improvement programs, anchored by sponsored athlete Umino Daito (trampoline national representative) and partnerships such as the Fujieda City Platinum Senior yoga program. A wholly-owned subsidiary operates the Sun Sun Nursery School (企業主導型保育 / company-run childcare), and additional sub-brands include the Kierukin antibacterial treatment product line and recurring employee wellness newsletters. The company is privately held with no disclosed external investors, parent company, or funding rounds.

Customer acquisition is sales-led through direct B2B relationships, RFPs, and public tenders, with marketing primarily through the company website, regional community engagement, sports sponsorships, and government partnerships. The company has earned recurring recognition including 7 consecutive years of Health Management Excellence Corporation certification (2020-2026) and a Special Commendation from the National Building Maintenance Association at its 60th anniversary ceremony in 2026.

Name

Sun Co.

Legal name

株式会社サン (SUN Co.,Ltd.)

Website

https://sun-sun-sun.co.jp

Company type

Private

Founded year

1970

Operating status

Operating

Short description

Sun Co. is a Japanese building maintenance company founded in 1970, providing integrated facility management — cleaning, equipment management, security, and disinfection — for offices, hotels, hospitals, condominiums, airports, and care facilities across the Chubu and Kanto regions.

Ownership category

akta.pro rank

Headquarters

HQ city

Shizuoka-shi

HQ country

Japan

HQ region

Asia

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Facility Maintenance Services: Recurring facility management and maintenance contracts for commercial buildings, condominiums, hotels, hospitals, airports, and other institutional facilities, covering cleaning, equipment management, security, and environmental management services.
2. Wellness Business: Sports promotion and health improvement services including corporate wellness programs, health check events, yoga classes for seniors, trampoline training, and company-led childcare services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Sun Co. (株式会社サン) is a Japanese building maintenance and facility management services provider delivering cleaning, equipment management, security, and disinfection/antibacterial environmental management across offices, commercial facilities, hotels, hospitals, condominiums, airports, and senior care facilities in Japan. The company also operates designated management services for public facilities, condominium management, a wellness division for sports promotion and health improvement, and a company-run childcare subsidiary.

Product overview

Sun Co. is a comprehensive building maintenance company offering integrated services including cleaning, equipment/facility management, security, and disinfection/antibacterial environmental management. The company operates across the 総合ビルメンテナンス (Comprehensive Building Maintenance) division covering services for various facility types (offices, commercial facilities, hotels, hospitals, condominiums, airports, and care facilities). Additionally, Sun Co. provides 運営・管理業務 (Operation and Management Services) including designated management and condominium management, and has a ウェルネス事業 (Wellness Business) division focused on sports promotion and health improvement featuring trampoline athlete 海野大透. The company also operates 企业主導型保育 (company-run childcare) services under the サンサンナースリースクール brand. Core service brands include キエルキン for antibacterial products, ヘルシー通信 and メディカ��ル通信 for employee health communications, and original exercise programs スマイルサン体操・スマイルサンストレッチ.

Differentiator

Problem solved

Functional benefit

Brands

• キエルキン (Kierukin): 消毒・抗菌・環境管理サービス (Disinfection, antibacterial and environmental management service)
• サンサンナースリースクール (Sun Sun Nursery School)
• サン・ウェルネス (Sun Wellness)

Products and services

• Cleaning Services (清掃) Professional cleaning services for buildings and facilities including offices, commercial facilities, hotels, hospitals, condominiums, airports, and care facilities across Japan.
• Equipment/Facility Management (設備管理) Comprehensive equipment and facility management services ensuring proper operation, inspection, and maintenance of building systems for commercial and institutional facilities.
• Security Services (警備) Building and facility security services covering guard, surveillance, and access control operations for offices, hotels, hospitals, condominiums, and other facility types.
• Disinfection, Antibacterial, and Environmental Management (消毒・抗菌・環境管理) — Kierukin (キエルキン) brand Specialized disinfection, antibacterial treatment, and environmental management services under the Kierukin sub-brand for buildings requiring elevated hygiene and infection prevention, such as hospitals, care facilities, and commercial venues.
• Designated Management Services (指定管理業務) Government-designated facility management and operation services for public facilities, awarded through public tenders administered by Japanese municipal and prefectural governments.
• Condominium Management (マンション管理) Comprehensive condominium building management services covering common area maintenance, building equipment management, and resident-facing services for residential condominium associations.
• Wellness Business (ウエルネス事業部) — Sports Promotion and Health Improvement Sports promotion and health improvement services including corporate wellness programs, health check events, yoga classes for seniors (e.g., Fujieda City Platinum Senior Project), trampoline training featuring athlete Umino Daito, and employee health communications.
• Company-Run Childcare (企業主導型保育) — Sun Sun Nursery School (サンサンナースリースクール) Corporate-operated childcare services operated as a wholly-owned subsidiary under the Sun Sun Nursery School brand, providing childcare support to working families in the Shizuoka region.

Named customers1 record

Segments7 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Seven partnerships are on record, tiered minor and core.

• SBS (静岡新聞社・静岡放送) / SBS ShizuokaminorGTM or Marketing Partner · 19 May 2026Joint event with SBS (Shizuoka Shimbun/SBS Broadcasting) for the public recording event of the soccer radio program 'FooTALK!' hosted by ペナルティ・ヒデ and 鬼頭里枝. President 斯波 appeared on the program and co-organized the June 28 public recording event at MARK IS Shizuoka featuring J-League clubs Shimizu S-Pulse, Jubilo Iwata, Fujieda MYFC, and Atsulclano沼津.
• 島田市 / 島田市サッカー協会 / 島田市レク協 (Shimada City / Shimada Football Association / Shimada Recreation Association)coreStrategic or Co-development Partner · 2 September 2025Sun Co. co-hosted the 1st SHIMADA GREEN Ci-TEA CUP youth football/futsal tournament held August 25-27, 2025 at Shimada General Sports Center Rose Arena. The event featured Spain's FC Barcelona junior futsal team and attracted youth athletes from across Japan. Sun Co. was listed under しまだローズパートナーズ (Shimada Rose Partners) as operational cooperation partner.
• 藤枝市 (Fujieda City)coreStrategic or Co-development Partner · 10 June 2025Cooperative partnership for the Platinum Senior Project Yoga Class, a health promotion program for seniors aged 60+. The program, now in its second year (2025), saw over 100 participants in 2024. Sessions are held at Fujieda City Hall 2F meeting rooms, with株式会社サン organizing and Fujieda City providing cooperation. Participants pay 500 yen per session and receive yoga instruction plus body composition measurements.
• 株式会社ディー・エッチ・エー・マリンフーズ / DHA Marine Foods Co., Ltd.minorOthers · 11 January 2023Product sponsorship partnership for trampoline athlete 海野大透. DHA Marine Foods provides TUNAPLUS+ (天然フィッシュ蛋白質 / natural fish protein) supplement for post-training and post-competition protein replenishment. DHA Marine Foods is based in Shizuoka City Shimizu Ward and is an SDG-declared company specializing in tuna processing.
• 静岡科学館る・く・る (Shizuoka Science Museum Ruku-ru)coreStrategic or Co-development PartnerEducational partnership conducting joint programs since 2022 (4th year in 2025). Programs include cleaning robot demonstrations with programming education using coil-spring robots, and scientific thinking workshops such as tower-building competitions. Sessions are held both at the museum and at elementary schools (e.g., 大河内小学校, 中藁科小学校).
• ベルテックス静岡 (Veltex Shizuoka)minorGTM or Marketing PartnerGame partner sponsorship for B3 League basketball team Veltex Shizuoka home games (January 21-22, 2023). Half-time trampoline demonstrations by 海野大透 were featured, with trampolines newly installed at Shizuoka Budokan in Fujieda.
• 島田市サッカー協会 / 藤枝東高校サッカー部 / MAKOTO HASEBE SPORTS CLUB / NP藤枝東FC / Shizuoka Gymnastics Association / AINET GroupminorStrategic or Co-development PartnerVarious local organizations providing cooperation for Sun Co.'s サン・サッカー教室 (Sun Soccer School) held September 30, 2023 in Fujieda and Shimada. Guest instructors included former Jubilo Iwata players 大井健太郎 and 成岡翔. Multiple local companies sponsored the event.

Scale indicators2 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Aeon Delight Co., Ltd. Japan-listed comprehensive facility management company providing cleaning, security, equipment management, and disinfection services across commercial and retail properties — directly comparable to Sun Co.'s full-service building maintenance model at a larger national scale.
• Sanki Engineering Co., Ltd. Japan-listed plant and facility services provider offering building equipment maintenance, cleaning, and facility operations; comparable to Sun Co. through its equipment management and comprehensive building services portfolio.
• Tokyu Community Corp. Japanese condominium and building management firm providing cleaning, security, and facility management services, with overlap to Sun Co.'s condominium management and building maintenance operations.
• Dai-Dan Co., Ltd. Japanese building services provider covering HVAC, electrical, and facility maintenance including cleaning and security for commercial and institutional facilities — comparable to Sun Co. across integrated building services.
• Toda Building Management Co., Ltd. Japanese building management arm of Toda Corporation providing comprehensive cleaning, security, equipment management, and condominium management — closely mirrors Sun Co.'s service breadth.
• Tokyo Building Maintenance Co., Ltd. Specialized Japanese building maintenance company providing cleaning, security, and facility management across office, commercial, and institutional properties — directly comparable core offering to Sun Co.
• Ace Facility Management Co., Ltd. Japanese facility management provider offering cleaning, equipment maintenance, and security for office buildings and commercial facilities — directly comparable service profile to Sun Co. at similar mid-market scale.

Broad incumbents

• NTT Facilities, Inc. Large Japanese facility management subsidiary of NTT providing integrated building operations, cleaning, and equipment management at national scale — broader portfolio but overlapping core facility services with Sun Co.
• Mitsubishi Estate Home Management Co., Ltd. Japanese condominium and property management subsidiary of Mitsubishi Estate offering building management services, comparable to Sun Co.'s condominium management vertical within a larger real estate group's portfolio.
• Daiwa House Property Management Co., Ltd. Property and facility management arm of Daiwa House Group offering cleaning, security, and building operations across commercial and residential properties — broader-scale incumbent with overlap to Sun Co.'s service mix.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Sun Co.