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 develops custom software for banking and financial services, including digital banking platforms, lending systems, payment products, wallets, investment platforms, and trading software. Its fintech practice covers product discovery, custom development, UI/UX, cloud engineering, QA, cybersecurity, and post-launch support. The company has delivered fintech projects for clients across international markets and works with banks, brokers, fintech companies, and other financial organizations. Its banking capabilities include digital account opening, KYC automation, card management, open banking, fraud monitoring, core banking integration, and banking process automation. Itexus is headquartered in the United States and has development offices in Europe, making it a global delivery option for companies sourcing banking software development services.
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 extensive experience developing and operating financial technology infrastructure in Japan. Its banking work covers core banking, digital banking, payments, open APIs, application development, modernization, and cloud platforms. In Japan, the company has worked on major financial infrastructure including payment networks and shared banking systems. Its BeSTA banking application and Integrated Banking Cloud initiative address core banking modernization and shared infrastructure for financial institutions. NTT DATA also provides services for banks, credit companies, insurance companies, 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 portfolio includes NRI BaaS/CORE, a cloud-based core banking platform built around API-enabled banking functions, as well as internet banking and AML/CFT solutions. NRI provides IT solutions for banks, trust banks, securities firms, insurers, and asset managers. Its financial IT business covers commissioned system development, outsourcing, and financial business platforms, making the company particularly relevant to institutions modernizing established banking environments 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 develops and supplies financial systems covering core banking, management functions, customer channels, and other banking operations. Its next-generation core banking initiative emphasizes API integration and adaptability to changing financial requirements. The company has decades of experience with banking technology and has worked on open and cloud-based banking systems. Its solutions are relevant to banks and other financial institutions looking for core system modernization, digital transformation, customer-facing channels, or 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 develops and modernizes systems for banks and other financial institutions in Japan. Its banking work includes core banking systems and large-scale modernization programs covering applications, development methods, communications, infrastructure, data, and operations. NEC was selected as a construction vendor for Sumitomo Mitsui Banking Corporation's next-generation core banking system and has also introduced a dedicated modernization program for financial institutions. This makes NEC relevant to banks dealing with legacy platforms, complex integration requirements, and long-term 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, with a particular focus on modernization and migration of established banking technology. Its financial technology practice combines core system experience with cloud, digital transformation, and newer development approaches. Hitachi also provides a cloud-based low-code service for financial institutions that supports customer engagement and digital interactions through an Internet banking platform. Its experience makes it relevant to banks that need to modernize legacy environments without compromising reliability or operational continuity.
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 provides financial institutions with IT services across the full system lifecycle. Its Financial Services Group works with banking, insurance, securities, and credit organizations on planning, system development, implementation, maintenance, cloud services, data centers, and outsourcing. CTC also develops and operates systems used by banks, securities firms, and credit card companies. Its newer C-NOAH service provides financial institutions with SaaS-based business applications and platforms designed around 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 has developed banking and financial technology for domestic and international financial institutions. Its portfolio includes banking applications, payment connectivity, transaction monitoring, AML and KYC systems, and overseas core banking platforms. The company has also developed mobile applications for regional financial institutions and provides systems for financial transaction processing. Its ORFE-Global platform, for example, was developed for overseas branches of Japanese banks and evolved from 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 provides IT services with a dedicated Financial IT business and a strong presence in payment services. Its work covers financial and banking systems, payment platforms, applications, and digital services. The company is headquartered in Tokyo and continues to develop systems and services for banks and other financial organizations. Recent initiatives include collaboration with Kyoto Bank on digitalizing invoice and payment workflows, while its broader financial business addresses 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 develops and operates financial systems for securities firms, banks, and asset management companies. Its banking solutions include investment fund sales systems and integrations with core banking and internet banking platforms. The company also provides IT strategy, system design, development, and operations, supported by financial-sector expertise. Its project portfolio includes large-scale modernization of financial core systems, including 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 develops banking infrastructure and fintech solutions designed to make banking functions available through digital platforms. Its services include banking applications, API infrastructure, authentication platforms, and implementation support for financial institutions and business partners. The company uses a cloud-native and API-first approach and has a Tokyo headquarters in Roppongi. Its focus is particularly relevant to organizations building embedded finance, digital banking services, or new financial products around 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 develops and operates systems supporting MUFG Bank and other MUFG companies. Its banking technology work covers domestic core banking, deposits, remittances, lending, trade finance, ATM and internet banking systems, payment systems, AML/KYC, financial markets, and international banking. The company also supports system development for securities and credit card businesses within the wider MUFG Group. Its Tokyo headquarters and dedicated banking technology organization make it one of the most directly 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 with a strong focus on financial systems. Its work has included system development for banks, securities companies, life insurers, and non-life insurers. The company handles both software and system development as well as consulting, and its financial technology work covers core systems used by financial institutions. Justice is based in Shibuya, Tokyo, making it a local option for organizations looking for a smaller specialist provider rather than 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. Its banking practice supports financial institutions with system planning, vendor management, internal development support, and IT talent. The company also works on securities, FX, and cryptocurrency projects, covering proposal, design, development, and maintenance. Based in Chiyoda, Tokyo, Stone System is a potential fit for financial organizations that need hands-on engineering support alongside consulting, PoC work, development, or internal IT capability building.
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.