DSP

HR Services / Staffingdsp-net.co.jp

DSP (Inside Growth Co., Ltd.) is a privately held Japanese staffing and business services firm offering HR solutions, IT engineer deployment (SES), recruitment placement, and insurance agency services to corporate clients in the Kanto region.

Company typePrivate
Founded2004
HeadquartersTokyo, Japan
Headcount501–1,000
GTM typeB2B
OfferingServices

What DSP does

DSP, operating under the trade name Inside Growth Co., Ltd. (インサイドグロース株式会社), is a privately held Japanese services company headquartered in Chiyoda-ku, Tokyo. Founded in 2004 and employing between 501 and 1,000 people, the firm operates a multi-line portfolio organized around human capital and business support services for corporate clients in the Kanto region.

The company's service portfolio spans five business divisions: HR Solutions (HRソリューション事業), NB / Net Business (NB事業), SES / System Engineering Service (SES事業), Human Resources Introduction / Recruitment Placement (人材紹介事業), and Insurance Agency (保険代理店事業). This structure combines traditional staffing and recruitment with IT engineer deployment via the SES model and insurance distribution. The firm targets corporate and business clients broadly — including companies needing IT engineering talent (SES), HR solutions, and insurance products — and applies a direct B2B sales motion through field engagement with enterprise buyers. Marketing channels include a corporate website, Instagram, X, and a CEO-led Note blog, primarily oriented toward recruitment branding and top-of-funnel awareness.

The company's revenue model is not publicly disclosed; no pricing details, customer counts, named accounts, or contract structures are available. There is no proprietary technology platform, no AI/ML capabilities, no patents or trademarks, and no disclosed funding rounds or institutional investors. The firm is undergoing an active repositioning: in March 2026 it announced a corporate name change and subsequently relaunched its homepage, reflecting a strategic emphasis on the "Inside + Growth" identity of embedded client partnership. Leadership consists of CEO Shinichiro Kamikawa; no other management team is publicly disclosed. Geographic footprint is confined to the Kanto region of Japan, and no partnerships, acquisitions, regulatory actions, or M&A activity are on record.

DSP firmographics

Firmographics

Name: DSP
Legal name: インサイドグロース株式会社
Website: https://dsp-net.co.jp
Company type: Private
Founded year: 2004
Operating status: Operating
Headcount range: 501–1,000 employees
Short description: DSP (Inside Growth Co., Ltd.) is a privately held Japanese staffing and business services firm offering HR solutions, IT engineer deployment (SES), recruitment placement, and insurance agency services to corporate clients in the Kanto region.
Ownership category
akta.pro rank

DSP industry classification

Industry

Product category: HR Services / Staffing
NAICS: Employment Placement Agencies (561311), Human Resources Consulting Services (541612)
SIC: Services-Employment Agencies (7361), Services-Help Supply Services (7363)
akta.pro primary industry: HR Shared Services Centers (Captive/Managed) (BPACAKAB)

Keywords

Human resources services
IT engineering staffing
SES staffing services
Recruitment agency
Insurance agency services

Where DSP is headquartered

Location

Headquarters

HQ city: Tokyo
HQ country: Japan
HQ region: Asia

Offices1 record

Markets served

DSP business model

Business model

GTM type: B2B
Offering type: Services
Cost components: Personnel, Operations, Marketing or Sales, Others

Distribution channels1 record

Marketing channels5 records

DSP product offering

Product offering

Core offering

DSP (Inside Growth Co., Ltd.) is a Tokyo-based HR services company that provides corporate clients in Japan with multiple workforce-related offerings, including HR Solutions, NB (Net Business) services, System Engineering Service (SES) for IT engineering staffing, Human Resources Introduction / recruitment placement, and an Insurance Agency line. Its core activity is placing and managing people — engineers, general staff, and recruits — into client organizations, supplemented by insurance brokerage services.

Product overview

DSP (Inside Growth Co., Ltd.) is a Japanese service company offering multiple business divisions: HR Solutions, NB (Net Business), SES (System Engineering Service), Human Resources Introduction, and Insurance Agency services. The company provides a portfolio of human resources and business support services rather than a unified software product.

Differentiator

Problem solved

Functional benefit

Products and services

HR Solutions Business (HRソリューション事業)

Companies that use DSP

Customer profile

Segments3 records

Ideal customer profiles2 records

DSP technology and API

Technology

Technology focussed No

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

DSP partnerships and signals

Strategic signal

Recent moves4 records

Expansion highlights3 records

DSP competitors and assessment

Company assessment

Broad incumbents

Persol Holdings: Major Japanese HR services group providing temporary staffing, permanent placement, and SES (IT engineering). Highly comparable given Inside Growth's mix of HR solutions, SES, and recruitment placement.
Pasona Group: Diversified Japanese HR services company offering temporary staffing, recruitment placement, and outsourcing. Comparable as a multi-line Japanese staffing operator with overlapping B2B client segments.
Recruit Holdings: Japan's largest staffing and HR services conglomerate operating across temporary staffing, permanent placement, and HR technology. Directly comparable as the dominant Japanese staffing incumbent against which smaller diversified firms like Inside Growth compete.

Direct peers

Fullcast Holdings: Japanese staffing and HR services company with short-term temporary staffing and BPO focus. Comparable to Inside Growth's HR solutions and outsourcing lines in the SMB/mid-market segment.
TechnoPro Holdings: Japan's largest independent engineering staffing and SES company. Closely comparable through its SES (System Engineering Service) line, which directly maps to Inside Growth's SES division.
Will Group: Japanese staffing firm specializing in temporary staffing, placement, and outsourcing across multiple verticals. Comparable in scale and diversified service offering to Inside Growth.

Emerging players

Open Up: Japanese staffing and recruitment firm focused on engineering and IT talent placement. Comparable through a similar SES/IT staffing orientation to Inside Growth's SES division.

Regional players

Hito Communications: Japan-focused HR/staffing and communications services provider. Comparable as a mid-sized Japanese staffing firm operating across similar B2B HR lines.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

DSP financial estimates

Financial estimate

Revenue estimate

Valuation estimate

DSP leadership team

Management profile

Number of profiles

Profiles1 record

DSP funding detail

Funding detail

Funding overview

Funding rounds

Investors

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

DSP M&A and investment

M&A and investment

M&A

Investments

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

Frequently asked questions about DSP

What does DSP do?

Is DSP a public or private company?

DSP is a private company. It is classified as unknown and is currently operating.

When was DSP founded?

DSP was founded in 2004. It employs 501 to 1,000 people.

Where is DSP based?

DSP is headquartered in Tokyo, Japan, in the Asia region.

Who are DSP's main competitors?

Broad incumbents on record are Persol Holdings, Pasona Group and Recruit Holdings. Direct peers are Fullcast Holdings, TechnoPro Holdings and Will Group. Open Up is listed as an emerging player. Hito Communications is listed as a regional player.

Does DSP have an API?

No public API is recorded for DSP.

What industry is DSP in?

DSP's product category is HR Services / Staffing. Its primary akta.pro industry code is BPACAKAB, HR Shared Services Centers (Captive/Managed). Its NAICS code is 561311 and its SIC code is 7361.