What SEC does

SEC Co., Ltd. (セック株式会社) is a Japanese commercial-space engineering and construction firm founded in 1967 in Kugayama, Tokyo, originally as Shibuya Sangyo Co., Ltd., and reorganized under its current name in 1991. The company is a wholly-owned subsidiary of Okamura Corporation (a Tokyo Stock Exchange-listed office furniture and equipment manufacturer) since 2009, operating within the Okamura Group under the shared philosophy 'Think of People, Create Spaces.' As of April 2026, SEC employed approximately 230 people and maintained 12 nationwide branch offices (Sapporo, Morioka, Sendai, multiple Tokyo locations, Nagoya, Osaka, Hiroshima, Fukuoka) plus 24/7 call centers in Sapporo and Tokyo.

SEC's core offering is an end-to-end 'total solution' covering site development, property introduction, architectural and equipment design, construction (architecture, interior, electrical, HVAC, plumbing, signage), and 24/7 maintenance, with specialization in cold-chain and refrigeration engineering originating from a series of industry-first systems developed in the 1970s–80s (heat reclaim, hot-gas defrost, air-cooled refrigeration, centralized temperature monitoring). The portfolio also includes an eco-solutions line — ZEB design (ZEB Planner since 2021), solar generation, EV charging, barrier-free toilet renovation (~3,000 completed store projects), eneFAN industrial large fans — plus a patented Data Center Security Cage using parallel sliding doors for high-density rack placement.

Revenue is generated through one-time construction and interior work contracts, professional design services, managed maintenance agreements serviced from the 24/7 call centers, and eco-solution projects, distributed through a direct enterprise field-sales motion via branch offices and a nationwide partner-company network for specialized trades. The customer base spans national retail chains (FamilyMart, Lawson, Inageya, Ikari Super), food service (Doutor Coffee, Katsumaru, Chateraise, Kaikatsu Club), financial institutions (Johoku Shinkin Bank, Aoshin Shinkin Bank, JA Osaka East, Seibu Shinkin Bank), and enterprise accounts (Trumpf, Morioka Nissan Motor, Renishaw, Okamura, AEON Next Delivery, Warabeya Nichiyoh, TORACO Konohana, pharmaceutical laboratories). SEC Retail Service Co., Ltd., a 2010 wholly-owned subsidiary, extends its reach into convenience-store operations.

Name

SEC

Legal name

SEC CO., LTD.

Website

https://sec-i.co.jp

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

101–250 employees

Short description

SEC Co., Ltd. is a Japanese commercial-space design, construction, and maintenance contractor, wholly owned by Okamura Corporation since 2009, providing total turnkey solutions for retail, food-service, financial, manufacturing, and industrial clients nationwide through 12 branches and 24/7 call centers.

Ownership category

akta.pro rank

Product category

Commercial Construction Services

NAICS

Security Systems Services (except Locksmiths) (561621)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Auxiliary Systems EPC (Station Service, HVAC, Fire Protection, Security) (EUAEADAK)

Keywords

• Commercial space construction
• Interior fit-out services
• Building maintenance services
• Retail store construction
• Energy-efficient renovation

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction and Interior Work: Comprehensive construction services including architecture, interior finishing, electrical systems, HVAC, plumbing, and specialized construction for commercial spaces such as convenience stores, restaurants, offices, and financial institutions.
2. Design Services: Planning, design, and consulting for commercial spaces from 20㎡ to 1000㎡, including architectural, structural, and equipment design with nationwide support from registered architects.
3. Maintenance Services: 24-hour maintenance support through call centers in Sapporo and Tokyo, including equipment repair, building/interior damage restoration, and emergency response.
4. Eco Solutions: Environmentally-focused solutions including toilet renovation, solar power generation, EV charging stations, ZEB design, and large industrial fans for energy efficiency and carbon neutrality.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

SEC provides total solutions for commercial spaces, covering the full lifecycle from site development and sales through design, construction (architecture, interior, and equipment), call center support, and ongoing building maintenance. The company also delivers eco-oriented offerings including toilet renovation, solar power generation systems, EV charging equipment installation, ZEB (Zero Energy Building) design, and large industrial fan (eneFAN) supply for chain stores, food service outlets, financial branches, distribution centers, and manufacturing facilities in Japan.

Product overview

SEC provides comprehensive total solutions for commercial spaces, from site development and design through construction and ongoing maintenance. The company operates as a single unified service offering centered on five interconnected divisions: Development & Sales, Design, Construction (building/equipment/interiors), Call Center, and Maintenance. SEC's ecosystem also includes eco-friendly construction solutions such as toilet renovation, solar power generation, EV charging equipment, ZEB (Zero Energy Building) planning, and eneFAN industrial large fans—all designed to reduce environmental impact while creating comfortable commercial environments. The company serves diverse sectors including retail, food service, offices, financial institutions, and industrial facilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Development & Sales Services Site acquisition support, tenant introduction, and property sales services for commercial real estate clients seeking suitable locations for retail, food service, or office operations.
• Design Services Architectural, interior, and equipment design services for commercial spaces including chain stores, offices, and industrial facilities, supported by an in-house staff of 189 architects and equipment designers.
• Construction Services (Architecture, Interior, Equipment) General contracting services for building construction, interior fit-out, and equipment installation of commercial properties, serving retail chains, food service operators, financial branches, distribution centers, and manufacturers.
• Call Center Support 24-hour customer support call center handling tenant and client inquiries related to construction and maintenance projects.
• Maintenance Services Ongoing building maintenance services delivered by a dedicated team of 26 building maintenance engineers across multiple facility categories.
• Toilet Renovation Eco-focused restroom renovation service including patented security cage systems for commercial facilities and toilet space renewal projects.
• Solar Power Generation Systems Design, installation, and integration of solar power generation systems for commercial and industrial rooftops and sites.
• EV Charging Equipment Installation Supply and installation of electric vehicle charging equipment at commercial properties, offices, and retail locations.
• ZEB (Zero Energy Building) Design Zero Energy Building design services enabling net-zero annual primary energy consumption for commercial facilities through integrated efficiency and renewable energy measures.
• eneFAN Industrial Large Fan Supply Sale, installation, and monitoring of eneFAN large industrial ceiling fans for logistics centers, factories, and large commercial spaces to improve air circulation and energy efficiency.

Named customers20 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Okamura Corporation (株式会社オカムラ)flagshipStrategic or Co-development Partner · 1 January 2009SEC became a wholly-owned subsidiary of Okamura Corporation in 2009, joining the Okamura Group. The partnership combines Okamura's manufacturing technology (furniture, equipment) with SEC's construction and maintenance expertise. Okamura Group's declaration 'Think of People, Create Spaces' guides shared values. Parent company is listed on Tokyo Stock Exchange.

Scale indicators8 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• Taisei Corporation: Leading Japanese general contractor with capabilities spanning commercial buildings, retail construction, and ZEB-class sustainable design; broad-incumbent alternative to SEC for national retail and corporate clients.
• Okamura Corporation: Tokyo Stock Exchange-listed parent company of SEC since 2009; manufactures office furniture, storage systems, and equipment, and operates a broader solutions portfolio spanning beyond SEC's construction and maintenance focus.
• Shimizu Corporation: Major Japanese general contractor delivering commercial buildings, retail fit-outs, and large-scale renovation projects across Japan; broad-incumbent competitor in the same retail and office end-markets as SEC.
• Daiwa House Industry: Largest Japanese homebuilder with a significant commercial-construction and logistics-facility segment; competes for retail-chain, convenience-store, and warehouse-construction accounts overlapping with SEC's customer base.
• Takenaka Corporation: One of Japan's largest general contractors with extensive commercial, retail, and interior construction capabilities; a broad incumbent that competes with SEC for large retail-chain and corporate fit-out accounts.
• Obayashi Corporation: Major Japanese general contractor with diversified commercial, retail, and industrial construction capabilities; broad-incumbent competitor to SEC for nationwide retail and corporate accounts.
• Kajima Corporation: Top-tier Japanese general contractor with national reach across commercial, retail, office, and industrial construction; competes with SEC for large retail-chain and corporate-office projects.

Direct peers

• Yurtec Corporation: Japanese electrical and air-conditioning construction specialist focused on commercial, industrial, and utility customers; comparable to SEC's electrical/HVAC scope within the same regional Japanese construction market.
• Kandenko: Major Japanese electrical facility construction company with capabilities in power, communications, and HVAC systems; comparable to SEC's electrical and HVAC construction work for commercial and retail customers.
• Sanki Engineering: Specialist Japanese HVAC, plumbing, and clean-room engineering contractor for commercial, industrial, and semiconductor facilities; competes directly with SEC on the building-services engineering scope that anchors SEC's commercial-space offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 SEC