About Us
Driving Quality Through Innovative System Reliability Solutions
Our Mission
At Sakura Software Solutions (3S), our mission is to help organizations move from reactive troubleshooting toward proactive, data-driven reliability management.
We believe software quality and system reliability should be measurable, predictable, and continuously improved throughout the entire development and operational lifecycle.
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 software quality intelligence platform that enables predictive, data-driven release governance for modern development teams.
Built on proprietary, patent-pending technology, STAR applies advanced analytics and EVR (Escape Velocity Rate) to surface emerging quality risks early in the development lifecycle. This enables teams to shift from reactive QA to proactive decision-making, improving release confidence and reducing late-stage defects.
From early development through deployment, STAR continuously analyzes defect trends and delivery signals to help teams understand system stability, prioritize corrective actions, and manage software quality at scale.
What Is FUSION?
FUSION™ is a system reliability intelligence platform that unifies software and hardware reliability analysis into a single, integrated environment.
Built on proprietary, patent-pending technology, FUSION is designed for engineering, QA, and reliability teams across aerospace, automotive, defense, telecom, industrial systems, and medical devices, FUSION enables data-driven system-level decision-making across the entire lifecycle.
At its core is an interactive graphical modeling environment that allows teams to construct and analyze system architectures. By combining visual reliability modeling with predictive analytics, FUSION helps organizations anticipate system behavior, identify failure risks, and improve operational reliability before deployment.

Kazuhira (Kazu) Okumoto, Ph.D.
Chief Executive Officer
Career Timeline
Ph.D., Syracuse University
- •Funded by Rome Air Development Center (RADC)
- •Co-developed the now widely cited Goel–Okumoto NHPP Software Reliability Model
Assistant Professor, Rutgers University
- •Secured NSF funding for early Software Reliability Engineering research
Bell Labs / AT&T / Lucent / Alcatel-Lucent / Nokia Bell Labs
- •Distinguished Member of Technical Staff (DMTS – highest research rank)
- •Co-authored the seminal textbook Software Reliability: Measurement, Prediction, Application
- •Led advanced reliability research and U.S. Navy development programs
- •Developed BRACE, the original precursor to the STAR predictive platform
- •Directed international technical programs in Japan and Ireland
Founder & CEO, Sakura Software Solutions (3S)
- •Founded 3S to operationalize predictive reliability engineering
- •Creator of the STAR and FUSION platforms
- •Principal Investigator on NSF-funded innovation programs
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
Ryan Choi
AI Engineering Lead
Ezra Redeatu
Software Consultant
Tsuyoshi Kojima
Sales & Marketing Representative (Japan)
Toru Yoshihara
Technical Marketing Consultant (Japan)
Collaborate With Us
Sakura Software Solutions welcomes opportunities to collaborate with industry partners, government organizations, universities, research institutions, and technology innovators advancing software quality and reliability.
Our collaboration interests include software quality analytics, reliability engineering, operational risk assessment, digital twins, AI-assisted decision support, and mission-critical systems.
In Collaboration With
Our tools are developed in collaboration with leading industry and academic experts around the world.
Industry Partners



Academic / Research Partners


