What REXIS does

REXIS (株式会社レクシス) is a Japanese professional services firm founded in February 1991 and headquartered in Osaka, with additional offices in Tokyo and Nagoya. The company specializes in ERP package implementation and business system integration, holding certified partner status with Oracle Japan (including a Master Distribution Agreement since 2016), SAP Japan (PartnerEdge since 2017), Microsoft Japan (since 2015), and NTT Data BizIntegral (since 2018, with a Biz∱Partner AWARD 2020 Special Award). Its core service offerings cover implementation and customization of Oracle ERP Cloud, SAP S/4HANA, Microsoft Dynamics 365, and NTT Data Biz∱, supplemented by MES (DELMIA Apriso), financial systems (risk calculation, market trading, internet banking, credit cards), CRM and billing systems, web and open systems, and emerging AI/IoT development services.

The company generates revenue primarily through professional services engagements and IT engineer dispatch (Labor Dispatch Operator permit 派27-304583). Approximately 90% of projects serve major enterprise clients across manufacturing, financial services, telecommunications, retail/distribution, and construction/energy verticals. Delivery is performed by engineers assigned to client project sites across 10 prefectures, supported by a directly employed engineering base of 51–100 staff. Differentiators cited include one-stop consulting-to-operations lifecycle coverage, multi-vendor ERP expertise, and accumulated domain knowledge over 30 years.

The business is privately held with a stated capital of 10 million JPY, led by Representative Director 葉山慧成 (Hayama Keisei). Privacy Mark certification (第17000402(08)号) supports its handling of personal data within professional services engagements. Recent operational activity in 2026 includes a Tokyo office relocation (June 25, 2026) and a full corporate website relaunch (June 3, 2026) following a May 2026 server breach incident that disrupted web and email access.

Name

REXIS

Legal name

株式会社レクシス

Website

https://rexis.co.jp

Company type

Private

Founded year

1991

Operating status

Operating

Headcount range

51–100 employees

Short description

REXIS is a Japanese professional services firm specializing in ERP package implementation and business system integration for enterprise clients across manufacturing, finance, telecom, and retail, serving as a certified partner of Oracle, SAP, Microsoft, and NTT Data Biz∱ since 1991.

Ownership category

akta.pro rank

Product category

ERP Implementation Consulting

NAICS

Custom Computer Programming Services (541511), Computer Systems Design and Related Services (54151), Computer Facilities Management Services (541513)

SIC

Services-Computer Programming Services (7371), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

ERP Implementation & Systems Integration Services (BPAEAGAA)

akta.pro secondary industries

Enterprise Application Managed Services Outsourcing (ERP/CRM/HRIS AMS) (BPAEAMAI), ERP/CRM/HRIS Implementation & Integration (BPAEAAAE), ERP Managed Services & AMS (Application Management) (BPAEAGAB), Public Sector & Government ERP (HDAEAEAG)

Keywords

• ERP implementation consulting
• System integration services
• Oracle SAP consulting
• IT staffing services
• Business system development

Headquarters

HQ city

Osaka-shi

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. ERP Implementation and System Integration Services: Professional services revenue derived from ERP package consulting, system development, and implementation services. The company provides end-to-end services from system planning and proposal through development and post-implementation support, charging project fees for system integration engagements.
2. IT Staffing / Human Resource Dispatch: The company holds a labor dispatch permit (派27-304583) and provides IT engineers dispatched to client project sites as part of its service offerings, generating staffing fee revenue.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

REXIS provides consulting and outsourcing of business systems, specializing in ERP package implementation (Oracle ERP Cloud, SAP S/4HANA, Microsoft Dynamics 365, and NTT Data Biz∫) and system integration for enterprise clients. The company delivers one-stop services from requirements assessment and system planning through development, implementation, and post-deployment operational support, and also dispatches IT engineers to client project sites under a labor dispatch permit.

Product overview

REXIS provides a comprehensive IT solutions portfolio centered on ERP package implementation and system integration services. The core offering includes implementation and consulting for major ERP platforms (Oracle ERP Cloud, SAP S/4HANA, Microsoft Dynamics 365, and NTT Data Biz∫), complemented by specialized solutions for MES (DELMIA Apriso), financial systems, CRM/billing systems, and web/open-system development. The company also offers data integration services using ASTERIA Warp and emerging technology development in AI, IoT, and RPA. REXIS operates as a partner vendor for Oracle, SAP, Microsoft, and NTT Data BizIntegral, providing one-stop services from consulting through system development and post-implementation support.

Differentiator

Problem solved

Functional benefit

Products and services

• ERP Package Solution (Oracle ERP Cloud) ERP implementation consulting and development support using Oracle ERP Cloud and Oracle E-Business Suite, covering requirements gathering, system design, implementation, and post-deployment support for enterprise clients.
• ERP Package Solution (SAP S/4HANA) SAP S/4HANA and SAP ECC/R3 implementation consulting and development support for enterprise clients across manufacturing, retail, and finance sectors.
• ERP Package Solution (Microsoft Dynamics 365) Microsoft Dynamics 365 ERP implementation and customization services for business process optimization, delivered as a Microsoft certified partner since 2015.
• ERP Package Solution (NTT Data Biz∫) Biz∫ ERP implementation and development partnership with NTT Data BizIntegral, covering implementation, customization, and post-implementation support for clients using the Biz∫ ERP platform.
• Web System Solution Web and open-system development services including core business systems, e-commerce sites, and FA control systems across manufacturing, finance, retail, and telecommunications sectors.
• CRM System Solution Billing and CRM system development including billing calculation systems, order management systems, and CRM/BI/DWH solutions for telecommunications and utility companies.
• Financial System Solution Financial system development specializing in risk calculation systems, market trading systems, internet banking, and credit card processing systems for financial institutions.
• AI/IoT Development Services Development services incorporating AI and IoT technologies for business automation, addressing labor shortage solutions and modern enterprise technology needs in manufacturing and logistics contexts.

Quantifiable outcome

• 90% of projects are for major enterprise clients, indicating strong market trust
• +1 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• 日本オラクル株式会社 (Oracle Japan)coreTechnology or IntegrationOracle Master Distribution Agreement holder. Certified technology partner for Oracle E-Business Suite. Certified partner for Oracle CRM On Demand. Active ERP Cloud implementation partner since 2020.
• SAPジャパン株式会社 (SAP Japan)coreTechnology or IntegrationSAP PartnerEdge certified partner (Edge level since March 2017). Implements SAP S/4HANA and SAP ECC/R3 solutions for enterprise clients.
• 日本.microsoft株式会社 (Microsoft Japan)coreTechnology or IntegrationCertified partner of Microsoft since March 2015, implementing Microsoft Dynamics 365 ERP solutions.
• 株式会社NTTデータ・ビズインテグラルcoreTechnology or IntegrationERP Biz∫ development partner certified since April 2018. Won Biz∫Partner AWARD 2020 Special Award. Implements NTT Data Biz∫ ERP solutions.
• SB C&S株式会社 (SoftBank C&S)minorGTM or Marketing PartnerIT solution sales partnership established in May 1999, focused on marketing and distribution of IT solutions.

Scale indicators3 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• NTT Data Group: Japan's largest IT services group and parent/partner of Biz∱, the ERP platform REXIS implements. Directly comparable in ERP services but at vastly larger scale; also a key channel partner.
• BIPROGY (formerly UNISYS Japan): Established Japanese IT services firm providing enterprise system integration, ERP, and outsourcing. Comparable as a long-standing Japanese SI with broad enterprise client base.
• Internet Initiative Japan (IIJ): Japanese IT services firm with systems integration, network, and enterprise solutions practices. Comparable for diversified Japan enterprise IT services delivery.
• SCSK Corporation: Major Japanese SI with strong ERP, financial systems, and IT outsourcing capabilities (Sumitomo group). Comparable for full-lifecycle ERP and system integration services in Japan.
• TIS Inc. Major Japanese IT services company providing system integration, ERP consulting, and outsourcing. Comparable as a Japanese-headquartered SI offering ERP-related services to enterprise clients.

Direct peers

• Works Applications: Japanese enterprise software company providing cloud ERP (HUE) and implementation services. Comparable as a Japan-focused ERP vendor/implementer targeting mid-market and enterprise clients.
• NS Solutions: Japanese systems integrator with deep manufacturing and ERP expertise (Nippon Steel group origins). Comparable for ERP implementation, MES, and enterprise system integration in Japan.
• Information Services International-Dentsu (ISID): Japanese SI firm with strong ERP, financial systems, and digital transformation practices. Comparable as a Japan-based mid-to-large SI serving enterprise clients across financial, manufacturing, and distribution verticals.
• ULS Consulting: Japanese mid-tier consulting firm specializing in Oracle ERP implementation. Directly comparable as a multi-vendor-capable boutique SI competing for enterprise ERP programs in the Japan market.

Regional players

• OBIC (OBC): Japanese enterprise business software vendor with partner-led implementation ecosystem. Comparable as a Japanese ERP-adjacent firm, though more software-product than services focused.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 REXIS