Tokyo has a deep pool of banking technology providers, ranging from large system integrators responsible for mission-critical financial infrastructure to specialist firms focused on banking applications, fintech platforms, and modernization. The companies below are relevant for projects involving core banking, digital banking, payments, financial APIs, compliance systems, cloud migration, and custom software development.
1. Itexus
Itexus builds custom software for banks and financial services: digital banking platforms, lending systems, payment products, wallets, investment platforms, and trading software. Its fintech team handles product discovery, custom development, UI/UX, cloud engineering, QA, cybersecurity, and post-launch support. Clients include banks, brokers, fintech companies, and other financial organizations in international markets. On the banking side, Itexus builds digital account opening, KYC automation, card management, and open banking. It also handles fraud monitoring, core banking integration, and banking process automation. The company is headquartered in the United States and has development offices in Europe, so it can deliver for banking clients worldwide.
Key Facts
- Best for: Custom digital banking and fintech platforms
- Core services: Banking software development, fintech development, mobile banking, lending, payments, digital wallets, trading
- Specialization: Custom financial software and fintech product engineering
- Industries: Banking, fintech, investment, payments, insurance
- Location: United States headquarters, Poland development office
- Notable strength: 300+ fintech projects across 23 countries
Contact Information
- Website: itexus.com
- Email: moc.suxeti@ofni
- Address: 8, The Green, STE road, Dover, DE 19901, USA
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
2. NTT DATA
NTT DATA has long experience building and running financial technology infrastructure in Japan. Its banking work covers core banking, digital banking, payments, open APIs, application development, modernization, and cloud platforms. In Japan, it has worked on major payment networks and shared banking systems. Its BeSTA banking application and Integrated Banking Cloud initiative help financial institutions modernize core banking and share infrastructure. NTT DATA also serves banks, credit companies, insurers, securities firms, and cooperative financial institutions.
Key Facts
- Best for: Large-scale banking infrastructure and core modernization
- Core services: Core banking, application development, payments, cloud, APIs, modernization
- Specialization: Mission-critical financial IT
- Industries: Banking, insurance, securities, credit
- Location: Tokyo, Japan
- Notable strength: Extensive experience with shared banking and payment infrastructure
Contact Information
- Website: www.nttdata.com
- Phone: 03-5546-8202
- Address: 3-3-3 Toyosu, Koto-ku, Tokyo 135-6033, Japan
- LinkedIn: www.linkedin.com/company/ntt-data
- Instagram: www.instagram.com/nttdata
- Twitter: x.com/nttdata
3. Nomura Research Institute (NRI)
Nomura Research Institute combines financial consulting with software development and managed technology services. Its banking products include NRI BaaS/CORE, a cloud-based core banking platform with API-enabled banking functions. NRI also offers internet banking and AML/CFT solutions. Its clients are banks, trust banks, securities firms, insurers, and asset managers. The financial IT business covers commissioned system development, outsourcing, and financial business platforms. NRI fits institutions that are modernizing older banking systems or launching digital financial services.
Key Facts
- Best for: Banking platforms, BaaS, and financial IT modernization
- Core services: Core banking, BaaS, internet banking, AML/CFT, system development
- Specialization: Financial IT platforms
- Industries: Banking, securities, asset management, insurance
- Location: Tokyo, Japan
- Notable strength: NRI BaaS/CORE supports API-based banking functions and cloud deployment
Contact Information
- Website: www.nri.com
- Phone: 03-5877-7100
- Email: pj.oc.irn@retsambew
- Address: 1-9-2 Otemachi, Chiyoda-ku, Tokyo 100-0004, Japan
4. BIPROGY
BIPROGY builds and supplies financial systems for core banking, management functions, customer channels, and other banking operations. Its next-generation core banking work centers on API integration and on adapting to changing financial requirements. The company has decades of banking technology experience, including open and cloud-based banking systems. Banks and other financial institutions turn to BIPROGY for core system modernization, digital transformation, customer channels, and integrated financial platforms.
Key Facts
- Best for: Core banking and financial system modernization
- Core services: Core banking, financial platforms, cloud, system integration
- Specialization: Banking and financial systems
- Industries: Banking, financial services
- Location: Tokyo, Japan
- Notable strength: Long-standing banking systems expertise and next-generation core banking development
Contact Information
- Website: www.biprogy.com
- Phone: +81-3-5546-4111
- Address: 1-1-1 Toyosu, Koto-ku, Tokyo, Japan 135-8560
5. NEC
NEC builds and modernizes systems for banks and other financial institutions in Japan. Its banking work includes core banking systems and large modernization programs. These cover applications, development methods, communications, infrastructure, data, and operations. NEC was selected to build the next-generation core banking system for Sumitomo Mitsui Banking Corporation. NEC also runs a dedicated modernization program for financial institutions. It fits banks with legacy platforms, complex integrations, and long modernization projects.
Key Facts
- Best for: Legacy banking modernization and large enterprise systems
- Core services: Core banking, application development, modernization, infrastructure, managed services
- Specialization: Large-scale financial IT
- Industries: Banking, securities, insurance
- Location: Tokyo, Japan
- Notable strength: Dedicated financial institution modernization program
Contact Information
- Website: group.nec
- Phone: +81-3-3454-1111
- Address: 7-1, Shiba 5 Chome, Minato, Tokyo, 108-8001
- LinkedIn: www.linkedin.com/company/nec
- Facebook: www.facebook.com/necjapan
- Instagram: www.instagram.com/nec_corp
- Twitter: x.com/NEC_jp_pr
6. Hitachi
Hitachi works on mission-critical systems for financial institutions, mainly modernizing and migrating older banking technology. Its financial technology team pairs core system experience with cloud, digital transformation, and newer development methods. Hitachi also offers a cloud-based low-code service for financial institutions. Built on an Internet banking platform, it supports customer engagement and digital interactions. Hitachi suits banks that must modernize legacy systems while keeping them reliable and running.
Key Facts
- Best for: Mission-critical banking modernization
- Core services: System modernization, migration, cloud, digital banking, low-code development
- Specialization: Financial core systems and enterprise technology
- Industries: Banking, insurance, financial services
- Location: Tokyo, Japan
- Notable strength: Modernization of long-running mission-critical financial systems
Contact Information
- Website: www.hitachi.com
- Phone: +81-3-3258-1111
- Address: 1-6-6, Marunouchi, Chiyoda-ku, Tokyo, 100-8280, Japan
- LinkedIn: www.linkedin.com/company/hitachi
- Facebook: www.facebook.com/hitachi.global
- : Instagram www.instagram.com/hitachi
- Twitter: x.com/Hitachi
7. ITOCHU Techno-Solutions (CTC)
ITOCHU Techno-Solutions supports financial institutions' IT across the whole system lifecycle. Its Financial Services Group works with banking, insurance, securities, and credit organizations. The work runs from planning, system development, and implementation to maintenance, cloud services, data centers, and outsourcing. CTC also builds and operates systems for banks, securities firms, and credit card companies. Its newer C-NOAH service offers SaaS-based business applications and platforms built for financial-sector security requirements.
Key Facts
- Best for: Enterprise financial systems and IT lifecycle services
- Core services: System development, cloud, infrastructure, outsourcing, SaaS
- Specialization: Financial-sector enterprise IT
- Industries: Banking, insurance, securities, credit
- Location: Tokyo, Japan
- Notable strength: Full lifecycle support from planning through operations
Contact Information
- Website: www.ctc-g.co.jp
- Phone: +81-3-6403-6000
- Email: pj.oc.g-ctc@sserp
- Address: 4-1-1, Toranomon, Minato-ku, Tokyo 105-6950 Japan
- Twitter: x.com/ctc_press
8. SCSK
SCSK builds banking and financial technology for financial institutions in Japan and abroad. Its products include banking applications, payment connectivity, transaction monitoring, AML and KYC systems, and overseas core banking platforms. It has also built mobile apps for regional financial institutions and runs systems for financial transaction processing. One example is ORFE-Global, a platform for overseas branches of Japanese banks. It grew out of SCSK's long-running SIBAS banking system.
Key Facts
- Best for: Banking applications, AML, payments, and financial operations
- Core services: Banking systems, mobile banking, AML/KYC, payment systems, core banking
- Specialization: Financial system development and operations
- Industries: Banking, credit, financial services
- Location: Tokyo, Japan
- Notable strength: Banking software experience spanning domestic and overseas financial institutions
Contact Information
- Website: www.scsk.jp
- Phone: 03-5166-2500
- Address: 3-2-20 Toyosu, Koto-ku, Tokyo 135-8110, Japan
9. TIS Inc.
TIS is an IT services company with a dedicated Financial IT business and a strong position in payment services. It builds financial and banking systems, payment platforms, applications, and digital services. Headquartered in Tokyo, TIS keeps developing systems and services for banks and other financial organizations. In one recent project, it worked with Kyoto Bank to digitalize invoice and payment workflows. Its wider financial business covers banking, cards, payments, and related financial technology.
Key Facts
- Best for: Banking, payments, and financial IT services
- Core services: System integration, software development, payments, financial IT
- Specialization: Financial and payment systems
- Industries: Banking, cards, payments, financial services
- Location: Tokyo, Japan
- Notable strength: Strong position in Japan's payment services technology market
Contact Information
- Website: www.tisi.jp
- Phone: +81-3-5337-7070
- Email: pj.isit.liam@ofni
- Address: 17-1, Nishishinjuku 8-chome, Shinjuku-ku, Tokyo, 160-0023, Japan
10. Daiwa Institute of Research
Daiwa Institute of Research builds and runs financial systems for securities firms, banks, and asset management companies. For banks, it offers investment fund sales systems and connects them to core banking and internet banking platforms. It also handles IT strategy, system design, development, and operations, backed by financial-sector expertise. Its projects include large modernizations of financial core systems, using containerized architectures and cloud-based disaster recovery environments.
Key Facts
- Best for: Financial system modernization and banking investment platforms
- Core services: Financial systems, system development, cloud migration, IT operations
- Specialization: Banking and capital markets technology
- Industries: Banking, securities, asset management
- Location: Tokyo, Japan
- Notable strength: Combination of financial expertise and system engineering
Contact Information
- Website: www.dir.co.jp
- Phone: +81-3-5620-5100
- Address: 15-6 Fuyuki, Koto-ku, Tokyo 135-8460 Japan
11. SBI Neo Banking System
SBI Neo Banking System builds banking infrastructure and fintech solutions that bring banking functions to digital platforms. It provides banking applications, API infrastructure, and authentication platforms. It also offers implementation support for financial institutions and business partners. The company works cloud-native and API-first, from its Tokyo headquarters in Roppongi. It fits organizations building embedded finance, digital banking services, or new financial products on reusable banking infrastructure.
Key Facts
- Best for: Digital banking, BaaS, and embedded finance
- Core services: Banking platforms, banking apps, APIs, authentication, implementation support
- Specialization: Cloud-native banking infrastructure
- Industries: Banking, fintech, financial services
- Location: Roppongi, Minato-ku, Tokyo
- Notable strength: API-first banking platform development
Contact Information
- Website: www.sbineobanking.co.jp
- Address: 19th Floor, Izumi Garden Tower, 1-6-1 Roppongi, Minato-ku, Tokyo 106-6019, Japan
12. Mitsubishi UFJ Information Technology (MUIT)
Mitsubishi UFJ Information Technology builds and runs systems for MUFG Bank and other MUFG companies. Its banking work covers domestic core banking, deposits, remittances, lending, and trade finance. It also covers ATM and internet banking, payment systems, AML/KYC, financial markets, and international banking. Beyond the bank, MUIT supports system development for securities and credit card businesses in the MUFG Group. With its Tokyo headquarters and dedicated banking technology team, it is one of the most banking-focused technology companies in the city.
Key Facts
- Best for: Core banking and large financial institution systems
- Core services: System planning, design, development, operations, infrastructure
- Specialization: Banking IT and financial infrastructure
- Industries: Banking, securities, credit cards, financial services
- Location: Nakano-ku, Tokyo
- Notable strength: Direct expertise across core banking, payments, AML/KYC, and digital channels
Contact Information
- Website: www.it.mufg.jp
- Phone: +81-3-3319-1111
- Address: 4-10-2 Nakano, Nakano-ku, Tokyo 164-0001, Japan
13. Justice Co., Ltd.
Justice provides software and IT solutions, mainly for financial systems. It has built systems for banks, securities companies, life insurers, and non-life insurers. The company does software and system development as well as consulting, including core systems for financial institutions. Justice is based in Shibuya, Tokyo. It is a local option for organizations that want a smaller specialist instead of a major national systems integrator.
Key Facts
- Best for: Financial system development and consulting
- Core services: System development, software development, consulting
- Specialization: Banking and financial institution systems
- Industries: Banking, securities, life insurance, non-life insurance
- Location: Shibuya-ku, Tokyo
- Notable strength: Focus on financial institution systems
Contact Information
- Website: www.justice-n.co.jp
- Phone: 03-6447-1772
- Address: Aoyama 705, 3-1-30 Jingumae, Shibuya-ku, Tokyo 150-0001, Japan
14. Stone System
Stone System provides IT services for banking, fintech, securities, FX, and digital assets. For banks, it helps with system planning, vendor management, internal development support, and IT talent. In securities, FX, and cryptocurrency projects, it handles proposal, design, development, and maintenance. Based in Chiyoda, Tokyo, Stone System fits financial organizations that need hands-on engineers alongside consulting, PoC work, development, or help building internal IT teams.
Key Facts
- Best for: Banking IT support and fintech development
- Core services: Consulting, system planning, development, maintenance, PoC
- Specialization: Banking, fintech, securities, FX, digital assets
- Industries: Banking and financial services
- Location: Chiyoda-ku, Tokyo
- Notable strength: Banking-focused engineering and internal IT support
Contact Information
- Website: www.stonesystem.co.jp
- Phone: 03-5820-7337
- Address: 2-4-6 Higashi-Kanda, S-GATE Akihabara 6F, Chiyoda-ku, Tokyo, Japan
- LinkedIn: www.linkedin.com/company/stone-system
- Facebook: www.facebook.com/stonesystem
- Instagram: www.instagram.com/stone_system_jp
- Twitter: x.com/stone_system_jp
Conclusion
A strong banking software development partner in Tokyo depends on the project's scale, technical requirements, and financial specialization. Large providers such as NTT DATA, NRI, NEC, Hitachi, and BIPROGY are suited to core banking and enterprise modernization, while companies such as SBI Neo Banking System and Stone System focus more closely on digital banking and fintech use cases. Itexus also offers custom development across digital banking, lending, payments, and other financial products for organizations looking for an international engineering partner.