HR One

What HR One does

HR One Corporation (エイチアールワン株式会社) is a Tokyo-headquartered Japanese business process outsourcing (BPO) company specializing in HR and payroll administration for enterprise clients. Founded in May 2002 by Sumitomo Trust Bank (now Sumitomo Mitsui Trust Bank), Matsushita Electric Industrial (now Panasonic Holdings), and Kao Corporation, with Mitsubishi Corporation joining as a shareholder in 2009, the company operates under the corporate positioning of a 'second HR department' (第二人事部). It serves 318 customer companies covering approximately 320,000 employees as of March 2024 across industries including conglomerates, trading companies, manufacturing, insurance, finance, and consumer goods.

The company's core technology comprises two proprietary portals — the 'RHYTHM' BPO portal for HR department data exchange and the 'HR One Portal' for employee self-service — layered over integrations with multiple enterprise HR/payroll platforms: SAP HCM and SuccessFactors (large enterprise and global), PROSRV by Mitsubishi Soken Consulting (1,000–5,000 employees), OBIC personnel payroll (100–2,000 employees), and ARDIO by Mitsubishi Electric Digital Innovation (up to 300 employees). HR One is Japan's only SAP-certified BPO partner, holds ISO/IEC 27001 ISMS certification since November 2003, and reports a 0.0012% error rate on year-end tax adjustment processing for ~300,000 targets. Add-on modules include SAP SuccessFactors talent management, My Number management, human capital disclosure support, and time-and-attendance systems.

The business model is managed services with setup/implementation fees and recurring operational fees. Go-to-market is consultative enterprise direct sales targeting HR departments, supported by free educational seminars, webinars, and inbound website inquiries. Distribution is single-country (Japan), with delivery centers in Tokyo (HQ), Osaka, and Okinawa. The company reported 99%+ client retention and a stabilized operating model after divesting its Shanghai subsidiary in February 2025 and launching a Workday integration partnership in February 2025.

Name

HR One

Legal name

エイチアールワン株式会社 (HR One Corporation)

Website

https://hrone.co.jp

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

501–1,000 employees

Short description

HR One Corporation is a Tokyo-headquartered Japanese HR and payroll BPO outsourcing company serving enterprise clients across industries, combining proprietary portals (RHYTHM, HR One Portal) with multi-ERP integrations (SAP, Workday, PROSRV, OBIC, ARDIO). Founded in 2002 by Sumitomo Mitsui Trust Bank, Panasonic, and Kao, it serves 318 companies covering ~320,000 employees.

Ownership category

akta.pro rank

Product category

HR & Payroll Outsourcing (BPO)

NAICS

Payroll Services (541214), Human Resources Consulting Services (541612), Office Administrative Services (5611)

SIC

Services-Miscellaneous Business Services (7380), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Comprehensive HRO (Multi-Process HR Outsourcing) (BPACAKAA)

akta.pro secondary industries

Payroll Outsourcing & Pay Administration (Multi-country/Managed Payroll) (BPACAKAD), HRIS/HCM Managed Services & Support (BPAEAGAF), Core HR & HRIS (BPACAPAA)

Keywords

• HR outsourcing services
• Payroll BPO services
• Social insurance administration
• Year-end tax adjustment
• Talent management services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. HR & Payroll BPO Services: Core revenue from comprehensive HR and payroll outsourcing services, including personnel management, payroll calculation, social insurance, year-end tax adjustment, employee support, certificate issuance, cloud HR payroll systems, employee-facing web systems, talent management, custom development, and consulting. Revenue is generated through setup/implementation fees and ongoing operational fees. System provision fees are charged separately.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

HR One delivers outsourced HR and payroll operations for Japanese enterprises, including employee data management, payroll calculation, social insurance and labor insurance administration, year-end tax adjustment, My Number handling, and human capital disclosure support. Service is delivered through the proprietary employee-facing HR One Portal, the proprietary BPO operations portal RHYTHM, and integrations with multiple Japanese HRIS products (SAP HCM, PROSRV, OBIC人事給与, ARDIO, SAP SuccessFactors, and Workday).

Product overview

HR One provides a comprehensive HR and payroll BPO service platform combining proprietary employee/HR department portals with enterprise HRIS integrations. The core offering consists of the HR One Portal (employee self-service) and BPO Portal 'RHYTHM' (HR department interface) as proprietary systems, backed by integrated enterprise HRIS platforms: SAP HCM for large enterprises (3,000+), PROSRV for mid-market (1,000-5,000), OBIC人事給与 for smaller organizations (100-2,000), and ARDIO for small companies (~300). Add-on modules include SAP SuccessFactors-based talent management, time and attendance systems, My Number management, and human capital disclosure support services.

Differentiator

Problem solved

Functional benefit

Products and services

• HR One Portal

Quantifiable outcome

• Year-end tax adjustment error rate of 0.0012% for approximately 300,000 processing targets (2023 fiscal year)
• +3 more outcomes

Named customers14 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature3 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Workday, Inc.coreTechnology or Integration · 1 February 2025Partnership announced February 2025 for providing integrated HR BPO services using Workday's platform. HR One has multiple global HR integration implementations using Workday.
• 三菱総研DCS株式会社 (Mitsubishi Research Institute DCS Co., Ltd.)coreTechnology or Integration · 1 December 2015Business and capital partnership. HR One uses PROSRV system provided by Mitsubishi Research Institute DCS for HR payroll BPO services targeting companies of approximately 1,000-5,000 employees.
• 株式会社三菱総合研究所coreStrategic or Co-development Partner · 1 December 2015Capital and business partnership alongside Mitsubishi Research Institute DCS.
• ADP, Inc. (オートマティック・データ・プロセッシング社)coreTechnology or Integration · 1 May 2010Global HR business process outsourcing partnership for Japanese companies. ADP is the world's largest HR payroll outsourcing company with approximately 570,000 client companies and annual revenue of approximately $84 billion (840 billion yen).
• SAP SE (SAP)coreTechnology or Integration · 1 October 2007HR One is Japan's only SAP-certified BPO partner (BPOパートナー). SAP licenses are provided through HR One, and SAP provides development and operations support. HR One delivers payroll and personnel management BPO services using SAP HCM and SuccessFactors platforms. Partnership established in October 2007, making HR One the first Japanese company to become an SAP BPO partner.
• 社会保険労務士法人とうかい (Social Insurance Labor Consultant Firm Toukai)coreImplementation/ SI/ Consulting PartnerPartner law firm for social insurance procedures. Provides all social insurance operations including enrollment, withdrawal, and employment insurance benefits. HR One refers clients to this firm.
• 社会保険労務士法人大野事務所coreImplementation/ SI/ Consulting PartnerPartner law firm for social insurance procedures. Instructor for HR law update seminars.
• 社会保険労務士法人ヒューマン・リソース・パートナーズcoreImplementation/ SI/ Consulting PartnerPartner law firm for social insurance procedures. Instructor for social insurance law update seminar.
• ヒューマンリンク株式会社 (Human Link Co., Ltd.)minorOthersMitsubishi Corporation subsidiary providing human resource development, HR consulting, and global HR solutions. HR One's predecessor through business succession in October 2009.

Scale indicators3 records

Recent moves17 records

Expansion highlights5 records

Broad incumbents

• ADP: World's largest payroll/HR BPO provider and already an HR One partner for global HR BPO into Japan; competes head-to-head on payroll and HR outsourcing while also serving as an upstream platform relationship.
• Recruit Holdings: Japan's dominant HR services conglomerate, with HR Technology, staffing, and BPO-adjacent offerings that overlap HR One's payroll BPO and HR operations outsourcing customer base across enterprise accounts.

Others

• Workday: Cloud-native HCM platform partner of HR One (since February 2025) and broader ecosystem enabler — not a direct BPO competitor but a strategic relationship that shapes HR One's ability to win cloud-HCM BPO mandates versus other Japanese outsourcers.
• SAP / SAP SuccessFactors: Core platform partner for HR One since 2007 (Japan's only SAP-certified BPO partner) and provides SuccessFactors — partner-ecosystem overlap with HR One where the platform itself can compete at the managed-services layer for global accounts.

Direct peers

• Ceridian / Dayforce: Global HCM and payroll BPO operator with managed services on top of its Dayforce platform — comparable in offering a combined HCM platform plus BPO services targeted at large, multi-country employers.
• Pasona Group: Largest Japanese HR services group, with significant HR BPO and shared-services operations directly competing with HR One for enterprise outsourcing mandates, including payroll, social insurance, and personnel administration outsourcing in Japan.
• TriNet: PEO-style HR outsourcing provider for small and mid-sized businesses — comparable to the SMB/co-employment edge of HR One's BPO spectrum, with similar reliance on shared-services delivery for clients without internal HR infrastructure.
• Paychex: US-focused HR and payroll BPO powerhouse serving SMB and mid-market — relevant analog for HR One's smaller-customer OBIC and ARDIO platform BPO tracks (100-2,000 employees and sub-300 segments).
• Alight Solutions: Global HR BPO and cloud HCM delivery partner (formerly Aon Hewitt) operating large-scale multi-process payroll BPO for enterprise clients — closely mirrors HR One's integrated HR/payroll/social-insurance scope and large-account operating model.
• SD Worx: Europe's largest independent HR and payroll services provider running multi-country, multi-process HR BPO — directly comparable in business model (managed services on multiple HRIS platforms with high operational accuracy SLAs) and a useful analog for HR One's Japanese enterprise positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 HR One