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About

Hajime Sugai is an instrumental astronomer whose career has been defined by advancing the frontiers of observational astrophysics, particularly through the development of cutting-edge spectrographic and imaging technologies. His primary research areas include the physical conditions and kinematics of ionized gas in galaxies, as well as the design and construction of high-performance astronomical instruments. Sugai’s major contributions are most notably embodied in the Kyoto Tridimensional Spectrograph II (3DII), a pioneering multi-mode instrument that integrates integral field spectroscopy and Fabry-Perot imaging. This device, detailed in his most-cited work (13 citations), was successfully deployed at both the University of Hawaii 88-inch and Subaru Telescopes, enabling unprecedented studies of galactic gas dynamics. He further cemented his legacy as a key figure in next-generation instrumentation through his work on the near-infrared camera for the Subaru Prime Focus Spectrograph (PFS). This ambitious project, part of the SuMIRe survey, is designed to simultaneously collect spectra from 2,394 objects, dramatically expanding our capacity for large-scale redshift surveys. Sugai’s technical ingenuity and dedication to building world-class instruments have made him an indispensable contributor to modern observational astronomy.