About Us
Driving Quality Through Innovative System Reliability Solutions
Our Mission
At Sakura Software Solutions, our mission is to advance system reliability through innovative, next-generation solutions that empower teams to predict failures, improve quality, and build resilient systems from development through operation.
Our Story
Spending his career at Nokia Bell Labs, Kazu was immersed in software quality assurance practices and developed BRACE, a first-of-its-kind software reliability tool still used companywide at Nokia. Seeing opportunities for further innovation, he founded Sakura Software Solutions (3S) with two former Nokia colleagues, Rashid and Rory. 3S introduced STAR, an enhanced tool for zero-touch automation of defect prediction and corrective actions with advanced visualization.
Later, 3S introduced FUSION, a cloud-based platform for integrated software and hardware system reliability. Today, through collaboration with experts from industry and academia, 3S continues to advance STAR and FUSION, helping organizations improve software and system reliability in real-world applications.
What Is STAR?
STAR is a cloud-based platform that helps software teams predict, assess, and improve software quality. It brings predictive analytics and EVR (Escape Velocity Rate) into the QA process to support data-driven decisions and more confident software releases.
By enabling shift-left insight, STAR helps teams identify rising defect risk early, take corrective action sooner, and understand the impact of quality improvements. From early testing through post-deployment, STAR empowers teams to proactively manage defects and maintain software stability across the entire development lifecycle.
What Is FUSION?
FUSION is a powerful cloud platform that brings software and hardware reliability together in one intuitive tool. NSF-awarded and built for engineering, QA, and reliability teams across industries such as automotive, aerospace, defense, telecom, industrial automation, and medical devices.
At the core of FUSION is an interactive graphical editor that allows teams to visually build and analyze system architectures. By combining visual system modeling with data-driven insights, FUSION helps teams predict, assess, and improve system performance from development through operations.

Kazuhira (Kazu) Okumoto, Ph.D.
Chief Executive Officer
Career Timeline
Ph.D. program at Syracuse University
- •Funded by Rome Air Development Center (RADC)
- •Developed the world-known Software Reliability Model, 'Goel-Okumoto model'
Assistant Professor at Rutgers University
- •A proposal for a 2-year software reliability program was accepted by NSF
AT&T / Lucent / Alcatel Lucent / Nokia Bell Labs
- •Published co-authored book: Software Reliability: Measurement, Prediction, Application
- •US Navy's EMSP development project - developed graphical queueing model simulator
- •Managed Japan customer technical support group with over 65 technical members
- •Developed BRACE, the original version of STAR
Founded Sakura Software Solutions
- •Retired from Nokia and founded 3S to bring STAR to the world
The Team
Meet the experts driving innovation in software reliability engineering.
Rashid Mijumbi, Ph.D.
Chief Technical Advisor
Rory Harpur
Chief Technical Officer
Joe Good
Senior Software Consultant
Michael Okumoto
Strategic Marketing Lead
Ezra Redeatu
Software Consultant
Tsuyoshi Kojima
Sales & Marketing Representative (Japan)
Toru Yoshihara
Technical Marketing Consultant (Japan)
In Collaboration With
Our tools are developed in collaboration with leading industry and academic experts around the world.

Professor Tadashi Dohi
Hiroshima University

Professor Hoang Pham
Rutgers University

Professor Lance Fiondella
UMass Dartmouth

Tim Crumbley
NASA