Fukusuke Takahashi has been a member of NTTDATA-CERT (the CSIRT of NTT DATA Group Corporation) since 2018, specializing in IR, OSINT, and SOAR. He is also a member of Yamato Security and one of the core developers of the open-source tools “Hayabusa” and “Takajo,” which are featured in this session. He enjoys fixing bugs and reporting vulnerabilities in open-source Blue Team tools and has published multiple CVEs. He has presented at several international conferences, including SecTor, HITCON, the Annual FIRST Conference, and SECCON.