Masayoshi Mizutani
Security Engineer at Ubie
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolMasayoshi Mizutani is a Security Engineer with 12 years of experience blending research-grade network security with hands-on software and systems development. He has worked across industry and academia—holding roles at IBM, Keio University, and current security positions at Ubie and Cookpad—focusing on detection, forensics, SIEM, and log analytics. Comfortable from raw OS and network tooling up to modern web services, he applies exploratory data analysis and visualization to hard security problems. His background includes post-doctoral research in malicious software analytics and building monitoring systems, giving him a strong footing in both theory and production practice. Masayoshi is curious about new programming languages, SDN, and distributed systems, and often bridges research insights into practical security tooling. Based in Chiyoda, Tokyo, he combines rigorous academic training (PhD) with pragmatic engineering to deliver auditable, scalable security solutions.
12 years of coding experience
1 year of employment as a software developer
Media and Governance, Computer Science, Network Security, Media and Governance, Computer Science, Network Security at Keio University
English, Japanese
Github Skills (136)
env10
vulnerability-scanners10
security10
scanner10
dotenv10
github-app10
golang10
vulnerability10
urlscan10
environment-variables10
message-forwarding10
log-in10
trivy10
scanning10
go-gin9
Programming languages (12)
Github contributions (5)
m-mizutani/zlog
Oct 2021 - Dec 2022
Secure logger in Go to avoid output sensitive data in log
Contributions:8 releases, 66 commits, 6 PRs in 1 year 2 months
golangsecureloggersecuritylog-in
m-mizutani/dnsmap
Jan 2015 - May 2022
Contributions:1 PR, 15 pushes, 3 branches in 7 years 5 months
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