What SACS does

SACS (株式会社サンセイコンピュータシステム, Sansei Computer System CO., Ltd.) is a privately-held Japanese business-software vendor founded in January 1988 and headquartered in Shimosuwa Town, Suwa District, Nagano Prefecture. The company develops, sells, and supports an in-house suite of business management products aimed at Japanese manufacturers and trading companies — principally the BusinessLink ERP covering quotation, order, purchase, sales, inventory, and production-process management, complemented by the AppSite Java web-application framework and the SPTL developer reporting tool. Its core technology stack is C++ for BusinessLink (native execution for high-speed processing) and Java for AppSite, with Microsoft SQL Server and Oracle as supported databases.

The company monetizes through a mix of one-time on-premises perpetual licenses (standalone, 5-user, 10-user, and unlimited tiers, plus a broad catalog of add-on modules such as BOM/MRP, EDI import, lot tracking, handheld terminal integration, iPad inventory and drawing access, and financial-accounting export), monthly recurring subscriptions for the single-tenant BusinessLink Cloud hosted at major Japanese data centers, commissioned custom software development, and ancillary computer hardware sales. Distribution is direct enterprise sales with online demo requests, supplemented by trade show participation (Business Show Tokyo since 1998, Suwa Region Industrial Expo) and recruitment-driven brand presence on Mynavi. SACS holds ISO/IEC 27001:2022 certification since 2011 and has been recognized as a METI Health Management Excellence Corporation for six consecutive years (2021-2026); it has no parent company, no external investors, and serves a domestic Japanese customer base with an emerging overseas-operations extension via a 2023 Chinese-language BusinessLink release and a 2024 Shanghai-based support partnership.

Name

SACS

Legal name

株式会社サンセイコンピュータシステム

Website

https://sacs.co.jp

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

11–50 employees

Short description

SACS is a privately-held Japanese software vendor that develops and sells the in-house BusinessLink ERP suite (and AppSite, SPTL tools) to Japanese manufacturing and trading companies via perpetual licenses, cloud subscriptions, and customization services.

Ownership category

akta.pro rank

Product category

Business Management Software / ERP

NAICS

Custom Computer Programming Services (541511), Software Publishers (51321)

SIC

Services-Computer Programming Services (7371)

akta.pro primary industry

Core ERP Suites (Financials, Procurement, Projects) (HDAEAEAA)

akta.pro secondary industries

Distribution & Wholesale ERP (Inventory, Order, Warehouse) (HDAEAEAC), Manufacturing ERP (Discrete, Process, Batch) (HDAEAEAB)

Keywords

• Business management software
• ERP software
• Inventory management system
• Cloud ERP solutions
• Custom software development

Headquarters

HQ city

Suwa

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Packaged Software Sales: Sale of BusinessLink and SPTL as on-premise software licenses. Available in multiple tiers: standalone, 5-user, 10-user, and unlimited versions. Includes customization services for additional fees.
2. BusinessLink Cloud Subscription: Monthly subscription-based cloud service providing order/purchase/sales management. Customers receive dedicated servers and databases (single-tenant architecture) with data isolation and scalability.
3. Custom Software Development: Commissioned software design and development services for custom solutions based on customer requirements.
4. Computer Equipment Sales: Sale of computer hardware and equipment as part of comprehensive system provision.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

SACS develops, sells, and supports BusinessLink, a comprehensive Windows-based ERP/business management software suite covering quotation, order, purchase, sales, inventory, and production process management, available as both on-premises packaged software and a single-tenant cloud subscription (BusinessLink Cloud). The company also markets AppSite, an in-house Java web application framework, and SPTL, a developer-oriented report design and runtime library, with optional customization, commissioned software development, and computer equipment sales as adjacent offerings.

Product overview

SACS offers a portfolio of four core product lines. BusinessLink is the flagship on-premises ERP covering quotation, order, purchase, sales, inventory, and production process management, with multiple configuration options and a broad set of optional add-on modules. BusinessLink Cloud is the single-tenant cloud-hosted version of the same management functions, operated on dedicated servers with a monthly subscription. AppSite is a Java-based web application development framework for building database-driven web systems. SPTL is a report template designer and runtime library for developers. The product portfolio spans business management software, web development tools, and developer utilities. All core products are developed entirely in-house.

Differentiator

Problem solved

Functional benefit

Brands

• BusinessLink: Business software package series covering estimate, order, purchase, sales, inventory, and production process management. Available in Japanese and Chinese versions.
• AppSite
• SPTL
• BusinessLink Cloud

Products and services

• BusinessLink Windows-based on-premises business management software covering the full cycle from quotation through order, purchase, sales, inventory, and production process management. Delivered as packaged software in standalone, 5-user, 10-user, and unlimited licenses, with native C++ execution for high-speed processing and broad Windows OS support (Windows 95 through Windows 11, Windows Server 2019/2022/2025). Built entirely in-house by SACS for Japanese enterprises.
• BusinessLink Cloud Cloud-hosted, single-tenant version of BusinessLink providing order, purchase, sales, and inventory management on dedicated servers and databases per customer, hosted at major Japanese data centers. Accessed via a managed access server over HTTPS with online user training and managed operations included, sold on a monthly subscription model.
• AppSite Java-based web application development framework for building database-driven web systems, with enhanced operability beyond traditional web interfaces. Developed and maintained continuously in-house by SACS since 2001, with a dedicated product site (appsite.jp).
• SPTL

Quantifiable outcome

• Average monthly overtime under 2 hours - significantly below IT industry average
• +2 more outcomes

Segments1 record

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature5 records

Partnerships

Six partnerships are on record, tiered minor and core.

• SGS Japan Corporation (SGSジャパン株式会社)minorOthers · 22 November 2024Third-party certification body conducting ISO/IEC 27001:2022 audit and registration services. Performs annual surveillance audits to maintain certification status.
• Shanghai-based System Company (中国・上海に拠点を持つシステム法人)coreStrategic or Co-development Partner · 1 January 2024Strategic partnership for Chinese market support of BusinessLink Chinese version. Partner provides on-site support including system operation guidance, hardware selection and repair consultation, and Chinese-language helpdesk services. Enables localized support for overseas customers in China.
• Shimosuwa Chamber of Commerce and Industry (下諏訪商工会議所)minorOthers · 1 January 2024Local chamber of commerce membership for business community engagement in Shimosuwa area.
• Major Japanese Data CenterscoreOthers · 1 January 2024Infrastructure partnership for BusinessLink Cloud service hosting. Major domestic Japanese data centers provide dedicated server and database infrastructure with 24/7 operations support.
• Nagano Prefecture Information Services Promotion Association (長野県情報サービス振興協会/NISA)minorOthers · 1 April 1989Industry association membership for Nagano Prefecture IT services companies. Joined April 1989.
• Nagano Prefecture Software Productivity Research Group (長野県ソフトウェア生産性研究会)minorOthers · 1 April 1989Industry research group joined November 1990 for software productivity improvement and best practices sharing.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• 弥生株式会社 (Yayoi Co., Ltd.): Japan's leading mass-market SMB accounting and business software provider. Comparable in its focus on Japanese SMEs and core accounting/sales workflows, with a broader brand footprint and stronger cloud offering (Yayoi Accounting Online).
• 株式会社マネーフォワード (Money Forward): Cloud-based business platform offering accounting, HR/payroll, and ERP for Japanese SMBs. Comparable in serving Japanese SMEs with integrated back-office workflows but with stronger venture funding, broader product breadth, and a cloud-only model.
• 株式会社ラクス (Rakus): Cloud SaaS provider of business applications for Japanese SMBs including expense management, e-invoicing, and workflow tools. Comparable in serving Japanese SMEs with cloud-delivered business productivity software, often as modular add-ons to existing accounting systems.
• ピー・シー・エー株式会社 (PCA Corporation): Long-established Japanese vendor of on-premise and cloud accounting/ERP/business management software for SMBs. Closely comparable to SACS in customer segment (Japanese SMEs), product portfolio (accounting + sales/purchase/inventory), and hybrid on-premise/cloud delivery model.
• TKC株式会社: Provider of accounting/ERP and tax-filing software for Japanese SMEs and tax professionals. Comparable in serving Japanese SMBs through accounting software that integrates with operational workflows, with a different distribution focus on certified tax accountants.
• 応研株式会社 (Oken): Japanese SMB accounting and business management software vendor with both on-premise and cloud offerings. Closely comparable to SACS in target customer (Japanese SMEs) and product scope (accounting + sales/purchase/inventory).
• 株式会社オロ (Oro Co., Ltd.): Provider of ZAC Enterprise — cloud ERP for project-based and manufacturing businesses in Japan. Comparable in delivering integrated business management (sales, purchase, inventory, production) to Japanese SMEs, with a more modern cloud-native platform.
• 株式会社オービックビジネスコンサルタント (OBC): Developer of the 奉行 (Bugyo) series of accounting, ERP, and HR software for Japanese SMEs. Comparable in targeting the same Japanese SMB segment with integrated sales/purchase/inventory workflows and major installed base.
• freee株式会社: Cloud-native Japanese SMB accounting, HR, and business management platform. Direct competitor in the cloud-delivered SMB ERP/accounting category, differentiated by modern UX and SaaS-first architecture that pressures SACS's on-premise legacy.

Emerging players

• インフォマート株式会社 (Infomart): Operates B2B platforms for electronic invoicing and procurement/order automation in Japan. Partial overlap with SACS's EDI import and sales/purchase workflows, focused specifically on invoice/order digitization rather than full ERP.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat4 records

Key risks6 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 SACS