KSF

What KSF does

KSF (株式会社KSF) is a privately held Japanese software development company headquartered in Shinagawa-ku, Tokyo, founded in 2001 with 51-100 employees. The company provides end-to-end system development services — spanning planning and proposal, design, development, testing, and post-release operational support — delivered exclusively through direct, prime contracts with clients rather than via subcontracting. Its core offerings fall into two areas: embedded software development (including IoT development for consumer electronics, such as work conducted at a major home appliance manufacturer's research institute) and application development (web and smartphone applications, including energy consumption visualization and historical-comparison apps for residential users, web payment systems, and entertainment Android applications).

KSF operates as a pure-play professional services firm with a single revenue stream — fees billed against embedded and application development engagements — and does not publicly disclose pricing or contract values. The company maintains wholly-owned subsidiaries 株式会社funlab (established July 2018) and 株式会社FITS (established January 2019), though the business focus of these entities is not disclosed. Customer segments are vertical in nature, with named work involving enterprise manufacturers (IoT/embedded) and energy-sector companies (consumer-facing energy apps). All delivery is concentrated in the Kanto region (Tokyo, Saitama, Chiba, Kanagawa). The company holds Japanese Privacy Mark certification, runs annual new-graduate recruitment through online briefings and platforms such as マイナビ, and emphasizes a family-like culture, mentor programs, and team-based engineering work as its primary talent retention and employer-branding differentiators. No external funding, M&A activity, or AI/ML capabilities are disclosed.

Name

KSF

Legal name

株式会社KSF

Website

https://ksf.jp

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

1–10 employees

Short description

KSF is a Tokyo-based Japanese software firm that provides embedded and application development services through direct prime contracts, primarily serving enterprise manufacturers and energy-sector clients in the Kanto region.

Ownership category

akta.pro rank

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. System Development Services: Professional services revenue generated from embedded software development and application development projects. KSF provides end-to-end services from proposal and planning through development to operational support, working directly with clients on prime projects.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

KSF provides end-to-end system development services for enterprise clients through direct (prime) contracts, specializing in embedded software development for IoT devices and consumer electronics as well as web and smartphone application development. The company delivers the full project lifecycle from proposal and planning through design, development, testing, and operational support, with work primarily for major manufacturers and energy sector companies in the Greater Tokyo Area.

Product overview

KSF is an IT services company that provides a unified suite of system development services, primarily focusing on embedded software development and application development. The company offers end-to-end services spanning planning and proposal, design and development, testing, and project management and promotion. Their work includes IoT development for consumer electronics manufacturers and web/smartphone application development for energy management systems, such as power usage visualization and historical comparison features for residential energy consumption. The company operates on a direct-client (prime) model, delivering services across Tokyo, Saitama, Chiba, and Kanagawa prefectures.

Differentiator

Problem solved

Functional benefit

Products and services

• System Development Services (システム開発) End-to-end system development services encompassing planning and proposal, design and development, testing, and project management. KSF delivers services through direct client relationships (prime contracts), handling everything from requirements definition to final release and deployment.
• Embedded Software Development (組み込みソフト開発) Specialized development of embedded software systems for IoT devices and consumer electronics. KSF has engaged in IoT development projects at major home appliance manufacturer research laboratories.
• Application Development (アプリケーション開発) Development of web applications and smartphone applications. Projects include energy management apps that display residential power consumption and compare historical usage data, web payment systems, and entertainment Android applications with feature additions.

Named customers1 record

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• NS Solutions Corporation: Japanese IT services firm affiliated with Nippon Steel, providing custom system development, embedded control systems, and consulting to industrial and manufacturing clients — overlapping with KSF's manufacturer-focused embedded and app development work.
• Nihon Unisys, Ltd. Long-established Japanese IT services company offering system integration, custom software development, and embedded solutions for enterprise and public-sector clients. Similar prime-contract delivery model to KSF, at materially larger scale.
• BIPROGY: Established Japanese IT services firm (formerly UNISYS Japan) providing custom system development, embedded solutions, and consulting to enterprises. Competes for the same manufacturer and enterprise custom-development engagements as KSF, with a broader portfolio.
• Information Services International-Dentsu (ISID): Japanese IT solutions company within the Dentsu group offering custom software development, embedded systems, and industry-specific solutions for manufacturers and financial institutions. Overlaps with KSF on embedded and enterprise app development.
• SCSK Corporation: Major Japanese IT services company (Sumitomo Corp. group) offering embedded systems, application development, and managed services to enterprise manufacturers. Much larger than KSF but operates in the same custom software services space serving similar Japanese enterprise clients.
• transcosmos inc. Large Japanese BPO and IT services company providing application development and digital services to enterprises, including energy and consumer-facing clients. Comparable application-development capability to KSF's energy-sector work, at much larger scale.
• TIS Inc. Large Japanese IT services group providing custom system development, embedded solutions, and consulting to enterprises across manufacturing and energy. Comparable business model (prime contract system development) but at significantly greater scale than KSF.

Direct peers

• Rakus Co., Ltd. Mid-sized Japanese software company providing cloud-based business applications and custom development services to Japanese enterprises. Similar headcount range to KSF and comparable custom-development services orientation for enterprise customers.
• TKC Corporation: Mid-sized Japanese IT services company providing custom system development, cloud services, and consulting to SMEs and local governments. Comparable size profile to KSF and similar focus on custom application development with direct client engagement.
• SRA Inc. Mid-sized Japanese independent IT services company offering custom software development, embedded systems, and consulting to enterprise clients. Most comparable to KSF in size profile and custom-development services orientation.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/ksf-jp

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries2 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 KSF