D. Brain Co.

What D. Brain Co. does

D. Brain Co. (D.BRAIN CO., LTD.) is a Tokyo-based commercial construction firm founded on March 23, 1990, specializing in space creation for luxury retail brands, restaurants, offices, galleries, showrooms and event venues. The company operates as a 100% prime contractor (元請け), handling projects directly rather than subcontracting to other general contractors, and deploys small teams of three to five people per project. Its primary segments are Luxury Retail Brands (boutiques and showrooms), Fine Dining & Food Service, Corporate Office & Commercial Facilities, and Gallery, Exhibition & Event Spaces, with work concentrated in Tokyo's premium districts such as Aoyama, Harajuku, and Shibuya. The company is part of the Hakuhodo Group (D. Brain Group) and is led by President Masanori Ishihara (石原 政徳); it also operates a wholly-owned subsidiary, JPDH co., ltd., focused on construction and interior/exterior work.

The firm's core products and services are organized into three integrated business lines: Construction Coordination Operations (pre-lease construction consulting, interior and exterior execution, and post-completion maintenance), Management Coordination Operations (project and construction management plus international project coordination with overseas designers), and Metal Products, Technical Design & Production (specialized work on curtain walls, steel doors, stairs, casts, and monuments with technical support from initial design through on-site installation). A dedicated maintenance section maintains a database of project-level information used for problem prevention and progress control, and the firm holds Specific Construction Works License No.100441 and First Class Architect Office Registration No.56544 (Tokyo Governor).

D. Brain makes money through project-based, custom-priced B2B construction contracts acquired via direct enterprise sales and relationship-based marketing with luxury brand clients and commercial facility developers in Japan. Revenue is generated from one-time construction engagements and professional services for project management and technical design. The go-to-market is sales-led and field-driven, supported by a partner-company subcontractor entry system for specialized trades. The firm recruits both new graduates and mid-career construction management professionals through Mynavi and RikuNavi portals, with mid-career base compensation starting at ¥300,000 per month including 20 hours of fixed overtime. The company has 60 employees, capital of ¥37,000,000, headquarters in Minami-aoyama (Minato-ku, Tokyo) and a studio in Kawaguchi-shi, Saitama.

Name

D. Brain Co.

Legal name

D.BRAIN CO., LTD.

Website

https://dbrain.co.jp

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

51–100 employees

Short description

D. Brain Co. is a Tokyo-based commercial construction firm operating as a 100% prime contractor for luxury retail brands, restaurants, offices, galleries and event venues in Japan, offering integrated services from property consulting through construction, technical design and ongoing maintenance.

Ownership category

akta.pro rank

Product category

Commercial Construction Services

NAICS

Commercial and Institutional Building Construction (23622), Nonresidential Building Construction (2362), Architectural, Engineering, and Related Services (5413)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540)

akta.pro primary industry

Self-Performing General Contractors (IMAFAAAI)

akta.pro secondary industry

Design-Build / EPC General Contracting (IMAFAAAD)

Keywords

• Commercial construction services
• Interior fit-out construction
• Luxury retail construction
• Construction project management
• Specialized metalwork fabrication

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction Operations: Core revenue from commercial facility construction including boutiques, restaurants, offices, galleries, showrooms, and events. Includes pre-lease construction, interior/exterior execution, and maintenance services.
2. Project Management / Construction Management: Management and coordination services from property selection through completion, including timetable creation, designer coordination, supplier selection, and budget control.
3. Metal Products, Technical Design & Production: Specialized metal work including curtain walls, door fittings, stairs, and monuments with advanced design requirements. Technical support from design through on-site installation.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels2 records

Core offering

D. Brain Co. is a 100% prime contractor providing commercial facility construction for luxury brands and commercial facility developers. Its core offerings include pre-lease construction consulting, interior and exterior construction execution, integrated project and construction management, specialized metal products and technical design (curtain walls, door fittings, stairs, casts, monuments), and dedicated post-completion maintenance services. Projects span boutiques, restaurants, offices, galleries, showrooms, and events, delivered through teams of 3-5 people.

Product overview

D. Brain Co. is a commercial facility construction company offering an integrated suite of services centered on space creation and execution. The core offerings include Construction Coordination Operations (pre-lease construction, interior/exterior execution, and maintenance), Management Coordination Operations (project/construction management and international project coordination with local architects), and Metal Products, Technical Design & Production (specialized metal work with technical design support). The company serves luxury retail brands, restaurants, offices, galleries, and exhibition spaces, providing end-to-end project execution from property selection through completion and ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Construction Coordination Operations End-to-end construction coordination for commercial facilities, including pre-lease construction consulting at the property selection stage, execution of interior and exterior construction, and ongoing post-completion maintenance. Suits luxury retail brands, restaurants, offices, galleries, showrooms and event venues that need a prime contractor capable of proposing construction methods, controlling cost and schedule, and coordinating with clients and designers.
• Management Coordination Operations Integrated project management and construction management services spanning timetable creation, designer coordination, supplier selection, budget control, and on-site management. Includes dedicated support for international projects working with overseas designers, handling conversion of foreign standards, approval tasks and coordination with local architects and specialized suppliers.
• Metal Products, Technical Design and Production Specialized metalwork and technical design services for curtain walls, steel door fittings, stairs, casts and monuments requiring advanced design and structure. Provides technical support from the initial design stage through on-site installation, serving commercial facility projects with bespoke architectural metal elements.
• Maintenance Services Dedicated post-completion maintenance for delivered commercial facility projects, including preventive maintenance, emergency response, root-cause problem diagnosis and a maintenance database used for progress control and prevention of recurring issues across the company's portfolio.

Named customers4 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Walsh Construction: US-based commercial and institutional general contractor. Comparable as a full-service GC with similar mix of commercial build-outs and design-build capabilities.
• Taisei Corporation: Major Japanese general contractor with nationwide commercial construction capabilities. Represents the scaled incumbent alternative for nonresidential building work in Japan.
• Takenaka Corporation: One of Japan's largest general contractors with extensive commercial and institutional building portfolio. Represents the broad incumbent alternative D. Brain competes against on larger commercial projects.
• Gilbane Building Company: US private commercial construction firm with strong commercial interiors and retail build-out practice. Comparable operating model — private, relationship-driven, commercial-focused GC.
• Hazama Ando Corporation: Large Japanese general contractor offering building construction across commercial, institutional, and infrastructure segments. Relevant as a broader competitor for nonresidential work.

Direct peers

• Swinerton: US-based general contractor with deep specialty in luxury retail, hospitality, and commercial interiors. Comparable business model — high-touch project execution for premium brand clients with similar boutique-versus-large-GC positioning.
• Structure Tone: Global commercial interior construction firm specializing in corporate, retail, and hospitality build-outs. Comparable as a project-management-led commercial fit-out contractor serving brand clients.
• Mitsui Designtec Co., Ltd. Japanese interior and space design/construction firm serving commercial facilities, retail, and offices. Most directly comparable as a Japanese specialty commercial interior provider competing for similar boutique and commercial fit-out work.
• VCC (Visual Construction Company): US specialty contractor focused on retail and restaurant construction for national brands. Directly comparable in service mix (retail/restaurant fit-out) and brand-driven project portfolio approach.

Emerging players

• Level 10 Construction: US-based commercial general contractor focused on corporate, hospitality, and retail interiors. Comparable niche positioning in commercial fit-out with similar project profile.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/d-brain

Compliance2 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 D. Brain Co.