EP Consulting Services

What EP Consulting Services does

EP Consulting Services (EPCS; 株式会社EPコンサルティングサービス) is a Tokyo-headquartered back-office business process outsourcing (BPO) firm founded in December 2001 that provides accounting/bookkeeping, tax, payroll, and social insurance/HR services to Japanese enterprises, listed companies, and foreign-owned subsidiaries operating in Japan. The company operates four core service lines — Accounting, Tax (via affiliated Tax Accountant Corporation EOS), Payroll, and Social Insurance/HR (via Social Insurance Labor Consultant Corporation EOS) — delivered as recurring managed-service contracts with custom-scope professional services pricing. As of April 2026 the firm employs 111 staff, including 9 social insurance consultants, 8 certified tax accountants, 6 certified public accountants, and 5 US CPAs, providing bilingual Japanese-English capability that targets the Gaishikei (foreign-capital) segment.

EPCS's go-to-market is direct enterprise field sales: clients engage through free consultation, receive quotes within 2 days to 1 week, and onboard in 1–3 months depending on scope. The company maintains a horizontal segmentation approach across large enterprises, listed company subsidiaries, foreign-owned subsidiaries, HR/payroll-specific buyers, and Japan market entry prospects. It is a wholly-owned subsidiary of Business Brain Showa (BBS), a Tokyo Stock Exchange Prime-listed professional services group, and operates as part of the BBS Group alongside affiliated licensed entities (Tax Accountant Corporation EOS, Social Insurance Labor Consultant Corporation EOS, Administrative Scrivener Corporation EOS) and regional subsidiaries including EPCS Okinawa (established October 2023) and an Osaka branch (opened November 2023). The firm has held Privacy Mark certification continuously since 2006.

Underlying technology is service-process rather than software-product based: documented multi-layer review (preparer/reviewer/manager) workflow, standardized procedures, and P-Mark certified data handling. The IT Solutions Division was divested to BBS Group affiliate GSX in April 2020, leaving the firm without proprietary technology products. Revenue is generated through ongoing service contracts rather than licensed technology, pricing is custom by scope/volume/complexity, and no public revenue, ARR, or valuation data are disclosed beyond registered capital of ¥1 billion.

Name

EP Consulting Services

Legal name

株式会社EPコンサルティングサービス

Website

https://epcs.co.jp

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

101–250 employees

Short description

EP Consulting Services is a Tokyo-based back-office BPO firm providing accounting, tax, payroll, social insurance, and HR outsourcing to Japanese enterprises, listed companies, and foreign-owned subsidiaries. Wholly owned by BBS Group, with 111 staff and bilingual Japanese-English service capability.

Ownership category

akta.pro rank

Product category

Back-office Business Process Outsourcing (BPO)

NAICS

Accounting, Tax Preparation, Bookkeeping, and Payroll Services (54121), Offices of Certified Public Accountants (541211), Office Administrative Services (56111)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro industry

PRIMARYBPAAAGAC

General Ledger & Close (Journal Entries, Month-End Close, Reconciliations)

Business & Public Services/Administrative & Support Services (BPO, Call Centers, Back Office)/Finance & Accounting Outsourcing (AP/AR, GL, Billing)

SECONDARYBPAAAGAI

Tax Operations Support (Indirect Tax, Withholding, Compliance Admin)

Business & Public Services/Administrative & Support Services (BPO, Call Centers, Back Office)/Finance & Accounting Outsourcing (AP/AR, GL, Billing)

SECONDARYBPACAHAL

Onboarding, Offboarding & Employee Lifecycle Administration

Business & Public Services/HR, Staffing & Recruitment Services/Employer of Record (EOR) & Global Employment / PEO Services

Keywords

• Back-office outsourcing
• Accounting services
• Tax filing services
• Payroll processing
• Social insurance administration

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Back-office Outsourcing Services: Outsourcing of accounting, tax filing, payroll processing, social insurance, and HR administrative tasks. Revenue generated through ongoing service contracts with enterprise clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

EP Consulting Services (EPCS) provides back-office business process outsourcing (BPO) services in Japan, covering accounting and bookkeeping, tax filing, payroll processing, and social insurance/HR administration. Services are delivered to large enterprises, listed companies, and foreign-owned companies operating in Japan, with bilingual (Japanese-English) support, and are executed through affiliated licensed entities (Tax Accountant Corporation EOS, Social Insurance Labor Consultant Corporation EOS, Administrative Scrivener Corporation EOS).

Product overview

EP Consulting Services (EPCS) is a professional services firm providing comprehensive back-office BPO services. The company operates through four core service lines: (1) Accounting and Bookkeeping Services, (2) Tax Services (via Tax Accountant Corporation EOS), (3) Payroll Processing Services, and (4) Social Insurance and HR Services (via Social Insurance Consultant Corporation EOS). These are offered as both basic services and specialized variants for listed companies, foreign companies, and SPC/asset securitization structures. Specialized consulting services in payroll optimization and HR advisory complement the core offerings. The firm is wholly owned by Business Brain Showa (BBS) and operates as part of the BBS Group.

Differentiator

Problem solved

Functional benefit

Products and services

• Accounting and Bookkeeping Services (会計・経理)
• Tax Services (税務サービス)
• Payroll Processing Services (給与計算)
• Social Insurance and HR Services (社会保険・人事労務)
• Listed Company Services (上場企業・国内企業向けサービス)
• Foreign Company Services (外資系企業向けサービス)
• Asset Securitization / SPC Services (資産流動化案件・SPCサービス)

Quantifiable outcome

• Quotation delivery within 2 days to 1 week
• +4 more outcomes

Named customers19 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Two partnerships are on record, tiered minor.

• Bilingual Legal/Administrative Partners (Bilingual lawyers, judicial scriveners)minorStrategic or Co-development PartnerNetwork of bilingual lawyers and judicial scriveners collaborating with EPCS for Japan market entry support, company registration, and administrative procedures.
• Foreign Capital Banking PartnersminorStrategic or Co-development PartnerPartnership with foreign-capital banks for payment processing and fund management services for foreign company clients.

Scale indicators4 records

Recent moves14 records

Expansion highlights6 records

Emerging players

• Yayoi Co., Ltd. (弥生株式会社): Yayoi is a leading Japanese accounting software vendor that has expanded into cloud accounting, payroll, and back-office support services for SMEs and small/mid-market companies. An emerging adjacent competitor with overlapping target segments in payroll and SME back-office, but primarily tech-enabled rather than service-led.

Direct peers

• Crowe Japan (Crowe LLP / クロウズ税理士法人): Crowe Japan provides audit, tax, accounting outsourcing, and advisory services to mid-market and foreign-invested enterprises in Japan through the global Crowe network. Comparable to EPCS for accounting and tax BPO, particularly for foreign subsidiaries requiring bilingual and cross-border support.
• TOMA (TOMA税理士法人): TOMA is a Japanese tax accountant corporation offering accounting, tax, payroll, social insurance, and HR consulting to SMEs and mid-market clients across Japan. Directly comparable to EPCS in service mix (one-stop back-office) and target segment, though with broader domestic SME exposure and less focus on the foreign-capital niche.
• BDO Japan (BDO Toyo & Co.): BDO Japan is the Japanese member firm of BDO Global, providing audit, tax, accounting outsourcing, and advisory services to mid-market and foreign-invested enterprises in Japan. Highly comparable to EPCS for accounting, tax, and BPO services targeted at foreign subsidiaries and listed-company subsidiaries in Japan.
• HLB Meisel (Meisel & Co.): HLB Meisel is a Japan-based accounting and advisory firm within the HLB International network, serving foreign-owned companies, SMEs, and listed entities with audit, tax, and outsourced accounting services. Directly comparable to EPCS's foreign-capital accounting and tax outsourcing practice.

Broad incumbents

• Pasona Group Inc. Pasona Group is a large Japanese HR services and BPO company providing staffing, payroll outsourcing, social insurance administration, and back-office services to enterprises across Japan. Comparable to EPCS on payroll and social insurance BPO at larger scale, but with less depth in tax and accounting specialization.
• KPMG AZSA LLC (KPMG 税理士法人): KPMG's Japan firm offers audit, tax, and outsourcing/advisory services as part of a Big 4 global network, including accounting and payroll BPO for large enterprises and foreign subsidiaries. Overlaps with EPCS on enterprise accounting, tax, and HR/payroll outsourcing, but at much larger scale and broader service portfolio.
• Deloitte Touche Tohmatsu LLC (Deloitte 税理士法人): Deloitte's Japan firm provides audit, consulting, tax, and managed services including BPO for accounting, payroll, and HR functions to large enterprises and multinational subsidiaries. Overlaps with EPCS in back-office outsourcing but operates at significantly larger scale with broader advisory and consulting offerings.
• Ernst & Young ShinNihon LLC (EY税理士法人): EY Japan provides audit, tax, and managed services including BPO to large corporates and foreign subsidiaries; notably, EY's predecessor (Ernst & Young ShinNihon) co-founded EPCS in 2001, making it a historical peer with overlapping foreign-company client base in Japan.
• PwC Japan LLC (PwC あらた有限責任監査法人): PwC Japan delivers audit, tax, and outsourcing services to large enterprises and multinational subsidiaries, including accounting and HR BPO. Comparable to EPCS at the high end of foreign-subsidiary and listed-company work, but materially larger and broader in service scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries4 records

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 EP Consulting Services