O.B.System Inc.
5576・Standard Market・Information & Communication
Business
OB System Co., Ltd. is an independent system integrator founded in 1972, with over 40 years of business relationships with Hitachi, Ltd. and BIPROGY Inc. The company operates four service lines: the Financial Business (banking, insurance, securities, credit), the Industrial & Distribution Business (industrial distribution, microcomputers, medical), the Public & Social Infrastructure Business (electric power ICT, social infrastructure, public sector, education), and the IT Innovation Business (cloud, system infrastructure, financial solutions). With bases in Tokyo, Osaka, and Nagoya, the company focuses on contracted development, operation, and maintenance work commissioned by end users, domestic IT manufacturers, and prime contractor SIers. It listed on the TSE Standard Market in June 2023 and is pursuing expansion of its consolidated business through M&A.
Business Model
Continuous projects and operation/maintenance contracts from major prime contractor SIers such as Hitachi, Ltd. account for more than half of sales, forming a stable revenue base. The company secures upward flexibility in project scale through a development structure combining in-house engineers and partner companies (outsourcing contractors). It also handles the sales and maintenance of its own products (Clinical Laboratory System CLIP / Health Examination System MEX-Plus). The gross profit margin for FY2026 (ending March 2026) is approximately 19.4% (net sales of ¥8,656 million, gross profit of ¥1,676 million).
Company Strengths
The company has maintained continuous business relationships for over 40 years with Hitachi, Ltd. and BIPROGY Inc., and for over 30 years with Mitsubishi Electric Software Corporation. Sales to Hitachi, Ltd. in FY2026 (ending March 2026) amounted to ¥2,865,620 thousand (33.1% of net sales). The accumulation of business knowledge and technical expertise built up through years of development track record functions as a barrier to entry, with continuing projects and operation/maintenance projects supporting stable earnings.
The company has obtained three certifications: ISO 9001:2015 (Quality Management System), ISO/IEC 27001:2013 (Information Security), and the Privacy Mark. The Quality Management Department systematically conducts "quality assurance inspections" and continuously refines standard quality target values. This framework functions to support continued order intake in high quality-demand areas such as finance and public sector.
The company made Human & Technology Co., Ltd. a subsidiary in April 2024 and Green Cat Co., Ltd. a subsidiary in May 2025. The order backlog for FY2026 (ending March 2026) increased substantially to ¥1,837,718 thousand (up 123.1% year on year), with sales recognition expected in the following fiscal periods and beyond. Synergies from M&A in the form of customer diversification and shared personnel know-how are contributing to the strengthening of the business foundation.
ENVALITH's Perspective
Performance Trend
Revenue rose for four consecutive periods, from ¥6,164 million in FY2023 to ¥6,897 million in FY2024, ¥7,685 million in FY2025, and ¥8,656 million in FY2026. The growth rate has been accelerating: +11.9% in FY2024, +11.4% in FY2025, and +12.6% in FY2026. Operating profit declined temporarily in FY2024 (from ¥591 million to ¥563 million) but recovered from FY2025 onward, reaching a record ¥672 million (+19.5%) in FY2026. Net income also hit a record high of ¥599 million (+23.6%). As an external factor, expanding investment related to DX, cloud, and generative AI has supported demand. The consolidation of Green Cat as a subsidiary (May 2025) also contributed additional revenue. A gain of ¥118 million from the sale of cross-shareholdings boosted net income. Note that the financial results report disclosed on April 22, 2026 was subsequently revised on May 12, with ordinary income corrected from ¥728 million to ¥727 million and net income from ¥601 million to ¥599 million.
Growth Strategy
Aiming for consolidated net sales of ¥10,000 million (FY2027, ending March 2027) through a three-pronged approach combining human capital strengthening, expanded business alliances, and M&A
Continuing annual new graduate hiring of 40-50 people while actively pursuing experienced-hire recruitment, and raising compensation levels to secure and retain talent. Focus on education and development of DX talent, including generative AI specialists, to accelerate their contribution. Also continuing to promote acquisition of various qualifications to enhance technical capabilities.
Promoting expansion of application development projects utilizing Microsoft Azure, strengthening proposal activities leveraging generative AI, and expanding orders for bank system infrastructure construction and investment trust projects. The IT Innovation Business performed steadily, with net sales of ¥671 million (+11.7%) in FY2026 (ending March 2026).
In May 2025, made Green Cat Co., Ltd. a wholly owned subsidiary (acquisition cost ¥700 million, goodwill ¥494 million, amortized over 9 years). Aiming to maximize synergies through strengthening financial system development capabilities, diversifying the client base, and sharing personnel know-how. Full-year consolidated contribution is expected in FY2027 (ending March 2027), when the effects are expected to fully materialize.
The Board of Directors resolved a policy of reduction, and sales have been proceeding in a planned manner in light of market conditions since FY2025 (ended March 2025). In FY2026 (ending March 2026), gain on sale of investment securities of ¥118 million was recorded as extraordinary income. This contributes to improving capital efficiency and securing funds for shareholder returns.
Last updated: July 19, 2026

