Top Custom Software and IT Services Companies Japan

Last updated: August 12, 2025 Country: Japan Industry: Technology & Telecom Companies listed: 21

This B2B directory page highlights 21 companies in Japan within the Technology & Telecom sector, helping you identify relevant suppliers, partners, and service providers faster.

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Top Custom Software and IT Services Companies in Tokyo

Discover the top custom software and IT services companies in Tokyo, offering trusted, up-to-date solutions to meet your business needs. This curated list saves you time by featuring verified companies with proven expertise in software development, IT consulting, and digital transformation services within Tokyo’s competitive market.

  • Fujitsu Limited – Fujitsu has over 80 years of experience providing custom software development, IT infrastructure, and cloud services tailored to Tokyo businesses. Recognized globally, they specialize in AI integration and digital transformation solutions.
    Website: www.fujitsu.com
    Contact: +81 3-6252-2220
    Address: 1-1, Kamikodanaka 4-chome, Nakahara-ku, Kawasaki City, Kanagawa 211-8588
  • NTT Data Corporation – Operating with extensive experience in custom software solutions and IT consulting for over 30 years, NTT Data offers scalable digital services and system integration primarily servicing Tokyo’s finance and manufacturing sectors.
    Website: www.nttdata.com
    Contact: +81 50-5546-8100
    Address: Toyosu 3-3-3, Koto-ku, Tokyo 135-6033
  • NEC Corporation – NEC delivers cutting-edge IT services in Tokyo, focusing on custom software development, security solutions, and IoT innovations. With multiple industry certifications, NEC has served Tokyo clients for over 100 years, pioneering AI-driven software services.
    Website: www.nec.com
    Contact: +81 3-3454-1111
    Address: 7-1, Shiba 5-chome, Minato-ku, Tokyo 108-8001
  • SCSK Corporation – SCSK specializes in custom software development, IT infrastructure, and cloud services with over 40 years in Tokyo’s IT industry. Their service portfolio includes system integration and AI applications, serving prominent clients in the Tokyo metropolitan area.
    Website: www.scsk.jp
    Contact: +81 50-8572-7000
    Address: 2-24-15, Toranomon, Minato-ku, Tokyo 105-6116
  • GMO Pepabo, Inc. – Focused on custom web solutions and cloud hosting, GMO Pepabo offers Tokyo businesses innovative software-as-a-service (SaaS) products and e-commerce platform development. Operating since 2003, they are a leader in user-friendly IT services.
    Website: www.pepabo.com
    Contact: +81 92-406-3030
    Address: 6-10-1, Roppongi, Minato-ku, Tokyo 106-0032
  • Hitachi Solutions, Ltd. – Hitachi Solutions delivers enterprise software and bespoke IT services with a strong focus on cloud computing and AI integration. Trusted by Tokyo’s manufacturing and service industries for over two decades, their consultative approach ensures innovative digital transformations.
    Website: www.hitachi-solutions.com
    Contact: +81 3-6774-1000
    Address: 11-1, Otemachi 2-chome, Chiyoda-ku, Tokyo 100-0004
  • Rakuten, Inc. – Rakuten provides custom e-commerce software solutions along with IT consulting and cloud services tailored to the Tokyo market. Founded in 1997, this tech leader integrates big data and AI into scalable platforms for enhanced customer experiences.
    Website: www.rakuten.co.jp
    Contact: +81 50-5840-7111
    Address: 1-14-1 Tamagawa, Setagaya-ku, Tokyo 158-0094
  • CyberAgent, Inc. – CyberAgent offers Tokyo businesses expertise in custom IT solutions, mobile app development, and digital advertising technologies. Operating for over 20 years, they leverage AI and big data for innovative software development and marketing services.
    Website: www.cyberagent.co.jp
    Contact: +81 3-5459-0200
    Address: 1-12-1 Dogenzaka, Shibuya-ku, Tokyo 150-8510
  • Nomura Research Institute, Ltd. (NRI) – NRI combines over 50 years of IT consultancy and customized software development services, specializing in financial IT systems in Tokyo. They provide data analytics, AI integration, and cloud services to large enterprises.
    Website: www.nri.com
    Contact: +81 3-2871-3400
    Address: 1-6-1 Marunouchi, Chiyoda-ku, Tokyo 100-0005
  • Dai Nippon Printing Co., Ltd. (DNP) – DNP specializes in custom software for digital content management and IT services focused on Tokyo’s publishing and media sectors. Established over 140 years ago, they provide innovative IT solutions and cloud services.
    Website: www.dnp.co.jp
    Contact: +81 3-3270-8111
    Address: 1-1, Hitotsubashi 2-chome, Chiyoda-ku, Tokyo 100-0003
  • Zeals Co., Ltd. – Zeals is a fast-growing Tokyo-based IT firm specializing in AI-powered chatbot platforms and custom software development for customer engagement. Since 2015, they have served numerous startups and SMEs with innovative digital communication tools.
    Website: www.zeals.co.jp
    Contact: +81 3-4405-5286
    Address: 2-6-1 Nishiazabu, Minato-ku, Tokyo 106-0031
  • Sansan, Inc. – Sansan offers cloud-based business card management and custom CRM software solutions, servicing Tokyo’s corporate sector for over 15 years. Their innovative IT services enhance networking and sales processes with AI-enabled technologies.
    Website: www.sansan.com
    Contact: +81 3-5357-1250
    Address: 3-27-1 Shibuya, Shibuya-ku, Tokyo 150-0002
  • Japan System Techniques Co., Ltd. (JAST) – JAST provides custom software development and IT consulting services with 30+ years in Tokyo. Their specialties include cloud migration, backend development, and IT infrastructure management. They are known for strong client support and tech expertise.
    Website: www.jast.jp
    Contact: +81 3-3456-3481
    Address: 3-2-1 Marunouchi, Chiyoda-ku, Tokyo 100-0005
  • Colopl, Inc. – Colopl offers Tokyo clients custom game software development and IT services, combining cloud technologies with AR/VR innovations. Founded in 2008, they focus on mobile platform solutions and interactive entertainment applications.
    Website: www.colopl.co.jp
    Contact: +81 3-6418-0300
    Address: 5-6-20 Minami-Aoyama, Minato-ku, Tokyo 107-0062
  • Sansan Inc. – Sansan specializes in SaaS CRM software solutions that improve network management and customer relationship management for businesses across Tokyo, employing AI to streamline processes for over 15 years. They are a trusted partner for multiple sectors.
    Website: www.sansan.com
    Contact: +81 3-5357-1250
    Address: 3-27-1 Shibuya, Shibuya-ku, Tokyo 150-0002
  • TeamLab Inc. – TeamLab provides Tokyo businesses digital transformation solutions and custom software with a strong emphasis on creative IT services using cloud computing and data visualization. Established in 2001, their portfolio covers art and corporate sectors.
    Website: www.teamlab.art
    Contact: +81 3-6380-0606
    Address: 6-11-3 Roppongi, Minato-ku, Tokyo 106-0032
  • CLS Holdings Japan K.K. – CLS is an IT services provider in Tokyo focusing on cloud consulting, custom software development, and system integration for SMEs. They offer agile software solutions and digital service management with 15 years of experience in the Tokyo region.
    Website: www.clsinc.jp
    Contact: +81 3-6228-6007
    Address: 3-4-2 Nihombashi Muromachi, Chuo-ku, Tokyo 103-0022
  • Infocom Corporation – Infocom specializes in customized IT services and software development for the Tokyo market with 40+ years’ experience, focusing on logistics, manufacturing, and cloud-based solutions with strong client partnerships.
    Website: www.infocom.co.jp
    Contact: +81 3-3375-1155
    Address: 1-5-5 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023
  • PKSHA Technology Inc. – Tokyo-based PKSHA is an AI and machine learning software developer, providing custom IT solutions for data analysis, natural language processing, and process automation across several industries since 2012.
    Website: www.pkshatech.com
    Contact: +81 3-6277-0157
    Address: Shibuya Scramble Square, 2-24-12 Shibuya, Tokyo 150-0002
  • Soracom, Inc. – Soracom offers IoT platform services and custom software development for Tokyo’s technology firms. Since 2015, they’ve provided secure network and data management solutions for connected devices across urban and industrial zones.
    Website: www.soracom.io
    Contact: +81 3-4405-0462
    Address: 2-38-7 Shibuya, Shibuya-ku, Tokyo 150-0002
  • Cybozu, Inc. – Cybozu delivers Tokyo businesses collaborative cloud software and custom IT services with over 20 years’ expertise, optimizing teamwork and dynamic project management with award-winning SaaS products.
    Website: www.cybozu.com
    Contact: +81 3-5215-2650
    Address: 1-7-2 Marunouchi, Chiyoda-ku, Tokyo 100-0005
  • V-cube, Inc. – V-cube specializes in cloud-based communication tools and custom software development for Tokyo businesses, supporting webinars, video conferencing, and remote work solutions for over 15 years.
    Website: www.vcube.co.jp
    Contact: +81 3-4330-0720
    Address: 1-9-2 Marunouchi, Chiyoda-ku, Tokyo 100-0005

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