What ISForce does

ISForce (インフォメーションサービスフォース株式会社) is a privately held Japanese IT company founded in July 2009 and headquartered in Minato-ku, Tokyo, with a secondary office in Osaka and approximately 332 employees as of April 2026. The company operates five service lines: (1) a System Product Business selling the proprietary "Mimasaka" series — Mimasaka Hanbai (integrated sales, purchasing, and inventory management) and Mimasaka Kaikei (financial accounting) — to small-to-mid-size enterprises across Japan, with approximately 1,500 cumulative customer installations over roughly 20 years; (2) System Integration (SI) contract development on Linux/Windows/Oracle Cloud platforms; (3) System Engineering Services (SES), providing delegated software development and operations to over 200 listed enterprise clients in finance, securities, distribution, and telecommunications; (4) General-purpose Machine Solutions covering IBM mainframe (z/OS, DB2, CICS, IMS) installation, customization, conversion, and operations; and (5) a Partnering program that sources engineers from small-to-mid-size software houses for remote project delivery.

The company's core technical differentiator is Mimasaka Tool (美作ツール), a proprietary Japanese-language 4GL (Fourth Generation Language) development platform on which the entire Mimasaka product family is built, running on Windows and Oracle Database with cloud deployment options via Parallels RAS (multi-device access) and Oracle Cloud Infrastructure (OCI). Mimasaka Kaikei supports up to 999-company multi-entity accounting, drill-down from trial balance to journal entry, Invoice system compliance, and segment reporting. The company holds ISO/IEC 27001:2013 ISMS certification (since December 2011, renewed November 2022), and its customer roster includes Shidax, NRI, NHK, Kameda Medical Information Systems, Japan Marine United, Recruit Group, IBM Japan, Fujitsu, NEC Platforms, Canon IT Solutions, Ricoh IT Solutions, Toshiba Information Systems, Hitachi Social Information Services, PwC Consulting, CSC Japan, Meiji Yasuda Systems Technologies, Itochu Techno Solutions, Kanden System Solutions, Kobelco Systems, Yokogawa Solution Service, Future Architect, NTT Comware, Softbank Commerce & Service, Mitsui Engineering Shipbuilding Systems, Chibagin Computer Service, Three F, and Nissho Electronics.

Revenue mechanics combine one-time Mimasaka product licenses, recurring maintenance contracts (helpdesk, customization, remote support), and professional services billings for SI/SES engagements (multi-year contracts, transactional 人数 billing) and mainframe engagements. ISForce grew through six M&A transactions between 2011 and 2019 absorbing predecessor entities (ユース, アプライドテクノ, エム・プランニング, デジー・テクノロジーズ, デジタリオ, ITソフトジャパン, plus the JP1 solutions carve-out from フィニス), inheriting more than 30 years of combined business and technical know-how. JAFCO Group became a strategic capital partner in October 2021. The current Representative Director is Sato Masaki (appointed September 2025), with Nakai Shinji serving as President. Operations are concentrated in the Tokyo metropolitan area (~80% of users) and Kansai/Osaka, with no disclosed international footprint.

Name

ISForce

Legal name

インフォメーションサービスフォース株式会社

Website

https://isforce.jp

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

251–500 employees

Short description

ISForce is a Japanese IT company that sells the proprietary Mimasaka sales and accounting software suite (built on a Japanese-language 4GL platform) to roughly 1,500 SMB customers nationwide, while providing system integration, system engineering, mainframe modernization, and partnering services to over 200 listed enterprise clients in finance, securities, distribution, and telecommunications primarily in the Tokyo metropolitan area.

Ownership category

akta.pro rank

Product category

Business Management Software

NAICS

Computer Systems Design and Related Services (54151), Computer Systems Design Services (541512), Custom Computer Programming Services (541511), Software Publishers (513210)

SIC

Services-Computer Integrated Systems Design (7373), Services-Computer Programming Services (7371), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

IT Program/Project Management (PMO) & Delivery Assurance (BPAEAAAO)

akta.pro secondary industry

iBPMS (Intelligent BPM Suites) & Process Automation Suites (HDAEAHAG)

Keywords

• Business management software
• System integration services
• System engineering services
• Mainframe support services
• Cloud deployment services

Headquarters

HQ city

Minato

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Product Sales — Mimasaka Series: Self-developed software products (Mimasaka Hanbai and Mimasaka Kaikei) sold directly through the company's marketing group and through sales agent/distributor channels. Includes customization services tailored to individual customer needs. Maintenance contracts provide ongoing support via helpdesk (operation guidance, remote access, troubleshooting). The Mimasaka series has been sold to approximately 1,500 companies nationwide over approximately 20 years.
2. Maintenance and Customization Services: Maintenance contracts (保守契約) provide ongoing support including helpdesk services (操作指導), remote operation, and defect analysis. Customization services adapt products to user needs. Revenue is recurring in nature through contract renewals.
3. System Integration (SI) Services — 業務請負サービス: Contract-based software development services using Linux and Microsoft Windows platforms, with Oracle Cloud virtual networks/servers. Targets major Tokyo metropolitan enterprise customers.
4. System Engineering Services (SES) — 業務委任サービス: Delegated software development and operations services under contract to major Tokyo-based enterprise customers in finance, securities, distribution, and telecommunications. Transaction-based (人月) billing. Over 200 enterprise client transactions.
5. General-purpose Machine Solutions — 汎用機ソリューション: Specialized services for mainframe (汎用機) systems including z/OS R7+ support, IBM mainframe installation, customization, and operations; technology support for mainframe infrastructure (OS, MQ, DB2, CICS, IMS); and mainframe conversion services.
6. Partnering Program: Partnership model with small-to-mid-size software companies where engineers are deployed to remote project sites. Revenue flows through project management fees from enterprise customers, with partner companies contributing engineer resources.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

ISForce develops and sells the Mimasaka series of integrated business management software (Mimasaka Hanbai for sales/purchasing/inventory and Mimasaka Kaikei for financial accounting), built on a proprietary Japanese-language 4GL development platform called Mimasaka Tool. The company also provides contract-based system integration, system engineering, mainframe solutions, and a software-house partnering program to large enterprises in Japan, primarily in the Tokyo metropolitan area.

Product overview

ISForce offers the Mimasaka series (みまさか販売 and みまさか会計) as its core commercial product line—ERP systems for small-to-medium enterprises developed using the proprietary 美作ツール (Mimasaka Tool) Japanese 4GL development platform. These are sold directly and through resellers to approximately 1,500 companies nationwide. The company complements its product business with system integration, system engineering, mainframe solutions, and partnering services. Cloud deployment options include Parallels RAS for multi-device access and Oracle Cloud Infrastructure hosting.

Differentiator

Problem solved

Functional benefit

Brands

• みまさか販売 (Mimasaka Hanbai): Sales management system for中小企企業 and mid-size companies with sales, purchasing, and inventory management capabilities
• みまさか会計 (Mimasaka Kaikei)
• 美作開発ツール (Mimasaka Development Tool)

Products and services

• Mimasaka Hanbai (みまさか販売) Sales Management System Integrated sales, purchasing, and inventory management system with multi-dimensional analysis capabilities. Covers quotation, order, shipment, sales, billing, accounts receivable, purchasing, accounts payable, warehousing, and inventory management. Features drill-down navigation, multi-warehouse management, four-dimensional performance aggregation, and Japanese consumption tax / Invoice (インボイス) system compliance. Targets small-to-mid-size Japanese enterprises.
• Mimasaka Kaikei (みまさか会計) Financial Accounting System Financial accounting system that centralizes journal entry data and supports management decision-making. Features include drill-down from trial balance to ledger to journal entry, multi-company management (up to 999 companies), cash flow statements (direct and indirect methods), electronic document compliance, segment management (5 classifications), reduced tax rate support, and an optional bill management module. Targets small-to-mid-size Japanese enterprises.
• System Integration Service (システム・インテグレーション・サービス) Contract-based computer system development service using Linux and Microsoft Windows platforms, with Oracle Cloud virtual networks/servers. Targets major Tokyo metropolitan area enterprise customers. Delivered at approximately 20+ development sites across the Tokyo region.
• System Engineering Service (システム・エンジニアリング・サービス) Delegated software development and operations service under contract (業務委託) for major listed enterprises. Targets finance, securities, distribution/retail, and telecommunications sectors. Billing is transaction-based (人月 / man-month). Over 200 corporate client transactions across listed enterprises.
• General-purpose Machine Solution (汎用機ソリューション) Mainframe technology services including technical support for mainframe infrastructure (z/OS R7+, OS, MQ, DB2, CICS, IMS), IBM mainframe system installation, customization, operations, and mainframe conversion/modernization services.
• Partnering Program (パートナリング)

Quantifiable outcome

• Mimasaka series sold to approximately 1,500 companies over ~20 years
• +3 more outcomes

Named customers27 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature4 records

Scale indicators6 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• OBIC Co., Ltd. Japanese ERP/business application software company focused on mid-market and large enterprises. Comparable as a domestic ERP/software publisher serving Japanese corporations with proprietary business software.
• Otsuka Corporation: Japanese IT services and solutions provider offering system integration, software, and support for SMB and mid-market clients. Comparable mix of product sales and recurring services with similar customer segments.
• Yayoi Co., Ltd. Leading Japanese accounting and ERP software provider for small and medium-sized enterprises. Comparable as a Japan-focused SMB accounting/business software publisher directly competing with Mimasaka Kaikei.
• TKC Corporation: Japanese accounting, tax, and ERP software firm serving SMBs and professional accountants. Comparable as a Japan-focused business software publisher with regulatory-localization expertise similar to ISForce's Mimasaka series.
• Works Applications Co., Ltd. Japanese enterprise ERP/HCM software vendor. Comparable as a domestic competitor building proprietary Japanese-localized enterprise software platforms for Japanese corporate clients.

Broad incumbents

• Nihon Unisys, Ltd. Established Japanese IT services firm providing system integration, consulting, and software solutions. Comparable SI and enterprise IT services portfolio with finance/enterprise focus.
• Future Corporation: Japanese IT consulting and SI firm providing enterprise system integration and IT strategy services. Comparable in enterprise SI consulting focus despite the partnership relationship ISForce has with Future Architect.
• NTT Data Corporation: Largest Japanese systems integrator offering enterprise IT services, consulting, and solutions across all major sectors. Comparable broad IT services portfolio; serves as a key enterprise customer segment competitor.
• TIS Inc. Major Japanese systems integrator offering SI services, software products, and outsourcing across multiple industries. Comparable in offering SI + proprietary software, though at significantly larger scale.

Emerging players

• Core Corporation: Japanese mid-tier IT services and embedded systems company. Comparable in offering software development and IT services to enterprise clients, particularly in finance and industrial sectors.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/information-service-force-ltd-

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 ISForce