The following list covers representative companies in various fields, including comprehensive IT services, manufacturer-related firms, global giants, specialized software, and internet services.
1. Comprehensive IT Services and System Integration (SIer)
These companies are the cornerstone of Japan’s IT industry, with business covering the entire chain from strategic consulting to system development and operation.
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
NTTデータ (NTT Data) Tokyo 190,000 (Global) Prime Government/Finance/Healthcare giant, national-level system contractor.
野村総合研究所 (NRI) Tokyo 19,000 Prime Top brand in financial IT consulting, high salaries, high profit margins.
富士通 (Fujitsu) Kanagawa 120,000 (Global) Prime Started with hardware, transformed into cloud services/DX, strong in social infrastructure.
日本電気 (NEC) Tokyo 110,000 (Global) Prime Government systems/network security/biometrics (facial recognition).
日立製作所 (Hitachi) Tokyo 300,000 (Global) Prime Social innovation (power/transportation/building systems), government/finance/industry IT.
エクシオグループ (Exeo Group) Tokyo 20,000+ Prime Large comprehensive IT service group formed by the merger of several IT companies, with a wide range of services.
TIS (TIS Inc.) Tokyo 25,000 Prime Large SIer, strong in finance and manufacturing sectors.
NTTコム (NTT Communications) Tokyo 10,000 (Group Listed) A subsidiary of NTT Group, focusing on network communication/cloud/data center services.
伊藤忠テクノソリューションズ (CTC) Tokyo 10,000 Prime A comprehensive SIer under Itochu Corporation, with a wide customer base.
SCSK (SCSK Corporation) Tokyo 10,000+ Prime IT service company under Sumitomo Corporation, with a wide range of services.
システナ (Systena Corporation) Tokyo 4,500+ Prime A subsidiary of NEC Group, providing a wide range of IT solutions and services.
日本ユニシス (Nihon Unisys) Tokyo 5,000+ Prime An established system vendor providing comprehensive solutions from hardware to software.
アイネス (INES Corporation) Tokyo 1,500+ Prime Focused on system integration in finance, public, and distribution sectors.
長野システム開発 (Nagano System Development) Nagano 1,000+ Standard A system development and service company in Nagano Prefecture and surrounding areas.
2. Manufacturer-Related/Industrial Software & High-Value Equipment
Originating from large manufacturing groups or having absolute advantages in specific industrial fields, their core product value relies on software.
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
キーエンス (Keyence) Osaka 9,000 Prime Sensors/automation, extremely high profit margins, high salaries, software value is very high.
ファナック (FANUC) Yamanashi 9,000 Prime Global leader in industrial robots/CNC systems, core control software.
ソニーグループ (Sony Group) Tokyo 100,000+ Prime Games (PlayStation)/AI/Finance/Entertainment, diversified software department.
三菱電機 (Mitsubishi Electric) Tokyo 140,000+ Prime Factory automation (FA)/elevators/automotive electronics, strong embedded software.
オムロン (OMRON) Kyoto 28,000 Prime Automation control/healthcare devices, leading in sensing and control technology.
デンソー (Denso) Aichi 170,000 Prime Toyota group, the world’s largest automotive parts supplier, automotive software/ECU.
ルネサスエレクトロニクス (Renesas Electronics) Tokyo 20,000+ Prime A global leader in microcontroller (MCU) supply, embedded software is key.
アドバンテスト (Advantest) Tokyo 5,000 Prime A giant in semiconductor testing equipment, complex device control software.
シスメックス (Sysmex) Hyogo 10,000 Prime A global leader in medical testing equipment, device software and data analysis are core.
富士ソフト (Fuji Soft) Kanagawa 6,000+ Prime A large software development and embedded systems company, with a wide range of services.
3. Global Tech Giants’ Subsidiaries in Japan
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
IBM Japan Tokyo 9,000 (Non-listed) Mainframe/cloud/AI, representative of high salaries in foreign companies, high-end clients.
Oracle Japan Kanagawa 5,000 (Non-listed) Absolute leader in databases/ERP, core in finance/telecommunications industries.
Google Japan Tokyo 2,000+ (Non-listed) Absolute leader in search, advertising, Android, and cloud services (GCP).
Amazon Japan (AWS) Tokyo 5,000+ (Non-listed) E-commerce giant, AWS cloud service department is technologically advanced, with strong salary competitiveness.
Microsoft Japan Tokyo 2,500+ (Non-listed) Core player in enterprise software (Office 365, Dynamics) and cloud (Azure).
Accenture Japan Tokyo 9,000 (In Japan) (Non-listed) A global consulting and IT service giant, focusing on strategy and digital transformation (DX).
4. Enterprise Software/Cloud Services (SaaS)
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
Works Applications (LAPIS) Tokyo 1,000 (Non-listed) Local ERP (human resources/finance) star, self-developed language, high salary culture.
Freee (Freee K.K.) Tokyo 1,500 Prime Cloud ERP (SaaS) startup star, very popular among SMEs.
Money Forward (Money Forward, Inc.) Tokyo 1,500 Prime Started with a household account book app, successfully expanded into enterprise financial SaaS.
オービック (OBIC Business Consultants) Tokyo 2,000 Prime Leader in ERP software for medium-sized enterprises, extremely high customer loyalty, stable revenue.
サイボウズ (Cybozu, Inc.) Tokyo 1,000 Prime Team collaboration/Groupware software (kintone, Cybozu Live).
ウイングアーク１st (WingArc 1st Inc.) Tokyo 1,000+ Prime Provides data visualization/Business Intelligence software “Dr.Sum”.
5. Internet/Consumer Services
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
LINEヤフー (LY Corporation) Tokyo 10,000 (Non-listed) National-level social/media/financial application, massive data volume.
楽天グループ (Rakuten Group) Tokyo 30,000 Prime Japan’s largest internet ecosystem (e-commerce, finance, mobile communication).
メルカリ (Mercari, Inc.) Tokyo 2,000 Growth C2C e-commerce unicorn, mobile technology/Microservices practitioner.
DeNA (DeNA Co., Ltd.) Tokyo 3,000 Prime Established mobile internet company, business includes games/healthcare/mobile.
GREE (GREE, Inc.) Tokyo 1,000 Prime Started with social games, transformed into game publishing/ad tech.
CyberAgent (CyberAgent, Inc.) Tokyo 9,000 Prime Large internet advertising agency, strong in gaming (Cygames)/media business.
ZOZO (ZOZO, Inc.) Chiba 1,500 Prime Fashion e-commerce, known for ZOZOTOWN and personalized recommendation technology.
PayPay (PayPay Corporation) Tokyo 2,000+ (Joint Venture) Japan’s mobile payment leader, large technical team.
6. Game Development
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
任天堂 (Nintendo Co., Ltd.) Kyoto 6,000+ Prime Global gaming giant, consoles (Switch) and first-party game software.
スクウェア・エニックス (Square Enix Holdings) Tokyo 5,000+ Prime Top global game developer (Final Fantasy, Dragon Quest).
セガサミーホールディングス (Sega Sammy Holdings) Tokyo (Group) 9,000+ Prime Games (Yakuza, Sonic), entertainment business.
バンダイナムコホールディングス (Bandai Namco Holdings) Tokyo (Group) 10,000+ Prime Games (Tekken, Pac-Man), toy business.
コナミグループ (Konami Group) Tokyo 9,000+ Prime Games (Pro Evolution Soccer, Yu-Gi-Oh), sports fitness, gambling machine business.
株式会社Cygames Tokyo 2,000+ (Subsidiary) Known for top-quality mobile games like Uma Musume and Granblue Fantasy.
株式会社アカツキ (Akatsuki Inc.) Tokyo 500+ Prime Mobile game developer and publisher, also invests in entertainment technology.
7. Cybersecurity/Communications
Company Name (English/Japanese) Location Employee Count (Approx.) Listing Status Company Features and Key Segments
トレンドマイクロ (Trend Micro Inc.) Tokyo 7,000 (Global) Prime Global leader in cybersecurity, originated in Japan, highly internationalized.
ラック (LAC Co., Ltd.) Tokyo 1,500+ Prime Provides security consulting, managed security services (SOC), etc.
FFRIセキュリティ (FFRI Security, Inc.) Tokyo 100+ Standard Cybersecurity software company focused on advanced threat protection.
さくらインターネット (Sakura Internet Inc.) Osaka 500+ Prime Japan’s leading independent cloud service provider and data center operator.
IIJ (Internet Initiative Japan Inc.) Tokyo 2,000+ Prime Japan’s first commercial ISP, now focused on enterprise networks and cloud services.
【Note】 The “Listing Status” column explains:
· Prime: Mature companies in the market, seeking stability, good benefits, and long career paths.
· Growth: Innovative companies willing to take risks, pursuing rapid growth and potential high returns.
· Non-listed/Foreign: Foreign giants or top startups, seeking higher salaries and more international work environments.
This list covers major software and IT service companies in Japan. If there are any omissions, please follow and provide information on omitted companies in the comments section. Thank you.