What CSS does

CSS Co., Ltd. (株式会社シー・エス・エス) is a Tokyo-headquartered IT services and systems integration firm founded in April 1976, operating as a subsidiary of the pure holding company CSS Holdings Co., Ltd. (established October 2018). The company delivers DX consulting, custom web and open-systems development, AWS cloud implementation and migration, data analytics and BI, PMO services, digitalization support, and DevOps — primarily to Japanese enterprise clients across the financial sector and adjacent verticals. Approximately 70% of revenue is sourced from direct prime contracts with end-user companies and information system subsidiaries, with FY2024 vertical exposure concentrated in securities (43%), social insurance (13%), telecom (10%), real estate (9%), banking (7%), credit (6%), and insurance (3%).

The technology portfolio spans web and open-systems development, AWS-based architecture including serverless design and data-lake construction, Python-driven analytics, and proprietary generative AI implementations — most notably an internally developed system of 24 industry-specific AI bots for news curation and a self-built B2B SaaS platform called Qube. Qube provides SNS-style business networking, meeting-room sharing with Stripe-backed payment processing, and event management, and is positioned as a stock-type recurring revenue layer atop the predominantly project-based services portfolio. As an authorized implementation partner for AWS (since 2015), HubSpot (since 2023), and MotionBoard (since 2013), CSS bundles these third-party platforms with consulting, customization, and ongoing development services under a single-window engagement model.

The business model combines project-based professional services — Web/open systems development (51% of FY2024 mix), cloud/infrastructure (22%), host systems (9%), PMO (9%), data analysis (5%), and others (4%) — with transaction-based revenue from Qube and reseller/implementation margins from third-party platforms. Distribution is anchored in a direct enterprise field-sales motion supported by content marketing, downloadable white papers, technical blogging (CSS Innovation Lab), free web consultation, and partnership channels (HubSpot, MotionBoard, AWS, Interplay). Group consolidated revenue reached ¥31.52 billion in FY ending March 2026 — the first time the group crossed the ¥30 billion threshold — across approximately 275 group employees, with ISO 9001 certification, AWS-certified engineering staff, and a CEO (Sagawa Manabu) in place since 2016.

Name

CSS

Legal name

株式会社シー・エス・エス

Website

https://css-net.co.jp

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

101–250 employees

Short description

CSS (株式会社シー・エス・エス) is a Tokyo-based IT services firm founded in 1976 that provides DX consulting, web/cloud development, data analytics, and PMO services primarily to Japanese enterprise clients in financial services, with a proprietary B2B SaaS platform called Qube.

Ownership category

akta.pro rank

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. System Development / Professional Services: Custom software development and system integration services for enterprise clients across financial, securities, and general industries. Services include consulting, web/app development, cloud construction, data integration, DevOps, and PMO support. Revenue is generated through project-based professional services, with mix including Web/open systems development (51%), cloud/infrastructure (22%), host systems (9%), PMO (9%), data analysis (5%), and others (4%) as of FY2024.
2. SaaS Product — Qube Platform: Qube is a proprietary B2B communication platform generating revenue through transaction commissions on meeting room sharing (23% + payment processing fee charged to hosts) and event management (3% + payment processing fee). SNS and basic platform access are free. Revenue is transaction-based and usage-driven.
3. Third-Party Product Reselling & Implementation: Authorized reseller and implementation partner for HubSpot (CRM/marketing automation) and MotionBoard (BI/visualization), providing integration, customization, and ongoing development support services. Revenue from product sales commissions and implementation professional services.
4. Cloud Services — AWS: AWS implementation and construction services as an AWS partner, covering application development, infrastructure design, data analysis, and maintenance. Revenue is project-based professional services related to cloud platform usage and implementation.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

Core offering

CSS provides custom enterprise system development, cloud infrastructure (AWS) implementation, data analytics/BI services, and digital transformation consulting primarily for Japanese financial institutions (with 40+ years of securities-sector relationships). The company also develops and operates its own proprietary SaaS product, Qube, a B2B communication platform enabling enterprise social networking, meeting room sharing, and event management, generating transaction-based commission revenue alongside its professional services portfolio.

Product overview

CSS offers a portfolio combining a proprietary SaaS platform with professional IT services. Qube is the company's flagship self-developed BtoB communication platform, providing enterprise SNS, meeting room sharing (with Stripe payment processing), and event management — a stock-type SaaS revenue model complementing the company's project-based services. The services portfolio spans AWS implementation (AWS導入・構築支援サービス), HubSpot CRM integration (HubSpot導入・開発支援サービス), and MotionBoard BI (MotionBoard導入・開発サービス), alongside core offerings including systems consulting, web application development, data analysis, PMO, DevOps, digitalization, cloud construction, and data integration. CSS also delivers vertical-specific solutions for securities (証券ソリューション) and financial services (金融ソリューション), sectors in which it has over 40 years of domain expertise. The company operates as both a systems integrator (services) and a product vendor (Qube), with 2026 group revenue reaching approximately 31.5 billion yen.

Differentiator

Problem solved

Functional benefit

Brands

• Qube: BtoB communication platform enabling business networking, meeting room sharing, and event management for enterprise customers.
• CSS Innovation Lab

Quantifiable outcome

• First time group revenue exceeded ¥30 billion (¥31.52 billion in FY March 2026)
• +5 more outcomes

Named customers7 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

Integration1 record

AI capability6 records

Feature4 records

Partnerships

Six partnerships are on record, tiered core and minor.

• Relife Japan Co., Ltd. (株式会社リライフ・ジャパン)coreStrategic or Co-development Partner · 1 July 2026A subsidiary of CSS Holdings providing high-level consulting services for upstream system design. Specializes in consulting at the most upstream stages of system development, complementing CSS's implementation capabilities. Will be absorbed and merged into CSS Co., Ltd. on July 1, 2026.
• Aim System Service Co., Ltd. (株式会社アイムシステムサービス)coreStrategic or Co-development Partner · 30 May 2025CSS Holdings acquired 100% of Aim System Service's shares on May 30, 2025, making it a wholly-owned subsidiary. Aim provides system maintenance and operational support services. This acquisition strengthens CSS's ability to offer end-to-end services from development through operations.
• Interplay (Cloud Partner Community)minorGTM or Marketing Partner · 1 January 2024Member of Interplay, a partner community of 130+ companies specializing in AWS cloud and solutions. Participated in joint webinars (Interplay Cloud Shift 2024) and marketing events for lead generation and thought leadership in cloud/DX space.
• HubSpotcoreTechnology or Integration · 1 January 2023Certified HubSpot implementation and development partner. CSS provides HubSpot CRM setup, customization, integration, and development support services. The CSS corporate website itself is built on HubSpot. Resells and implements HubSpot's marketing automation, sales, and service CRM platform.
• Amazon Web Services (AWS)coreTechnology or Integration · 1 January 2015AWS partner since 2015 providing comprehensive cloud services including application development, infrastructure design, serverless architecture, data lake construction, and cloud migration. Single-window service for all AWS-related needs. AWS-certified engineers on staff including Solutions Architect Professional and DevOps Engineer Professional holders.
• MotionBoard (by Woody Inc.)coreTechnology or Integration · 1 January 2013Authorized implementation and development partner for MotionBoard, a BI and data visualization platform. CSS provides MotionBoard introduction services, custom development, and ongoing support to help clients achieve data-driven decision making.

Scale indicators8 records

Recent moves8 records

Expansion highlights5 records

Others

• Accenture Japan: Global consulting and technology-services firm with major Japan operations serving banks, insurers, and securities firms on DX and cloud. Comparable to CSS as an enterprise-IT services competitor, but at a vastly larger scale and broader consulting mix.

Broad incumbents

• NTT Data Group: Japan's largest systems integrator with dominant financial-sector (banking, insurance, securities) client base. Comparable to CSS at the high level of financial-IT services, but operating at materially greater scale globally.
• BIPROGY (formerly Nihon Unisys): Major Japanese systems integrator with strong financial-sector presence (banks, insurance, securities). Comparable to CSS in financial-systems SI, but with a substantially broader enterprise portfolio.
• Fujitsu: Global Japanese IT-services giant with deep financial-industry systems-integration practice. Comparable to CSS in the financial-IT domain, though CSS is a much smaller specialist by comparison.
• TIS Inc. Large Japanese IT-services group with significant financial-industry system-integration exposure. Comparable to CSS as a domestic SI serving banks, securities, and insurance, but at much larger scale and broader portfolio.

Direct peers

• Internet Initiative Japan (IIJ): Tokyo-headquartered network and cloud-services provider with strong AWS partnership presence in Japan. Comparable to CSS in cloud-infrastructure, AWS ecosystem services, and Japan-enterprise IT delivery.
• Future Corporation: Tokyo-based IT consulting and systems integrator with strong financial-industry and DX focus. Closely comparable to CSS in size, financial-domain depth, and emphasis on consulting-led custom development.
• Nomura Research Institute (NRI): Japan's largest dedicated financial-IT systems integrator with deep securities and asset-management domain expertise. Directly comparable to CSS in serving Japanese financial institutions with custom system development and consulting.
• Techfirm Inc. Smaller Tokyo SI with mobile/web application development focus and financial-industry exposure. Comparable to CSS in the Web/open systems (51% of CSS revenue) service line and Japanese enterprise client base.
• OBC (Osaka Business Consultancy): Mid-cap Japanese SI focused on accounting and financial-business software for SMEs and corporates. Comparable to CSS in the Japanese financial-software niche, though with stronger product (packaged software) rather than pure-services orientation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/CSS_pr
• YouTubeyoutube.com/channel/UC9U-KupSd-Q0PCwd5KzNZFA
• Facebookfacebook.com/css.co.jp
• Instagraminstagram.com/css.co.jp

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries3 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 CSS