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T. Nagayama is a leading figure in gravitational microlensing, with a focus on detecting exoplanets and substellar objects through real-time observational systems. Their key research areas include microlensing anomaly detection, binary systems, and brown dwarf characterization. Nagayama’s major contribution is the development and application of the Automated Robotic Terrestrial Exoplanet Microlensing Search (ARTEMiS) system, which enabled the first automated real-time detection of a weak microlensing anomaly in the event OGLE-2008-BLG-510 (2012, 25 citations). This work demonstrated the feasibility of identifying subtle light-curve asymmetries—such as those caused by brown dwarfs or stellar binaries—without human intervention, advancing the efficiency of exoplanet surveys. Nagayama’s research has been instrumental in refining detection algorithms for low-mass companions, bridging gaps in our understanding of planetary and substellar populations. Their contributions have influenced subsequent microlensing projects and underscore the power of automation in astrophysical discovery. With a citation impact that highlights the significance of real-time anomaly detection, Nagayama continues to shape the field of exoplanet science.