Recent Research Subjects
Sun
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Solar radio emissions and particle acceleration with IPRT/AMATERAS
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Multi-wavelength observation of solar active region
Planets, and Satellites
Jupiter/Io
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Io-originated teneous gas and plasmas in the Jupiter's inner magnetosphere observed with HISAKI, and the Haleakala telescopes
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Jupiter's infrared aurora taken with Subaru/IRCS and NASA/IRTF/CSHELL/ISHELL
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Jupiter's synchrotron radio emission measured with IPRT/AMATERAS
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Jupiter's decametric radio emission observed with the HF antennas
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Jupiter's magnetospheric dynamics derived by Galileo
Saturn/Enceladus
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Satrun's auroral kilometric radio emission based on the Cassini data
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Enceladus' oxygen torus obtained with Haleakala/T60/Vispec
Venus and Mars
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Venus' middle and upper atmosphere derived by Akatsuki/IR1 and IR2
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Venus' mesospheric wind and temperature field based on MILAHI data
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Minor tracer gases on Mars revealed by MEX/PFS, and Exomars/TGO and ground-based telescopes(Subaru, SOFIA, ALMA etc)
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Martian atmospheric gravity waves observed by MEVEN
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Periodic variations of Venus upper atmosphere by Hisaki
Earth
Auroral Ionosphere, and Magnetosphere
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Small-scale discrete aurora and pulsating aurora obtained with Reimei, ground-based imagers (Poker Flat/MIRACLE/ALIS) and EISCAT/ESR
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Auroral polarization observed at Pokar Flat/Alaska
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Auroral radio emissions measured with ground, rocket and space experiments
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High-latitude ionospheric outflow and upflow obtained with Akebono and ground-based spectrometer at Svalvard
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Radiation belt high-energy particle revealed with ERG and ground-based LF radar
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Polar cap auroral dynamics in the northward IMF conditions
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Evolution of convection electric field and energy transfer in the magnetosphere during geomagnetically disturbed conditions
Upper and middle atmosphere
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Concentric atomospheric gravity waves at mid- and low-latitudes thermosphere observed by ISS/IMAP-VISI
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Tenuous gas analysis in the upper atmosphere
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Stratospheric sudden temperature increase
Moon
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Moon's surface structure and plasma environment observed with Kaguya
Exoplanets
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Polarization observation of exoplanetary atmosphere with T60/DiPOL2
Modeling and Simulation
Modeling and Simulation
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Numerical simulation of molecular clouds in protoplanetary disk
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KH instability in the Martian ionosphere and Mercury magnetosphere
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Generation and loss processes of Venus' sulfuric acid clouds with a GCM model
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Full-particle model of the Martian upper theremosphere-exosphere (Direct Simulation Monte Carlo (DSMC) method)
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Atmospheric escape from Mars and Venus
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Development of Martian GCM model
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Dynamics of Joupiter's inner magnetosphere
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Jupiter stratospheric GCM model
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Martian ancient atmosphere derived by a GCM model
Development
Space-borne Instruments
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Reimei/MAC (Multi-spectral auroral camera)
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ISS/IMAP-VISI (Visible and near-Infrared Spectrograph Instrument)
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ERG/PWI (Plasma wave)
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BepiColombo/MMO(Mercury Magnetospheric Orbiter)/PWI(Plasma Wave Investigation)
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JUICE/RPWI(Plasma wave) and SWI(Submillimeter Wave Instrument)
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Mars Moon eXploration/NIRS4 (Near-infrared hyper-spectral imager)
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Gaussian baffle vane for future Mars mission
Ground-based instruments
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MILAHI: Mid-Infrared Laser Heterodyne Instrument (Nakagawa et al. 2016)
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A wide field-of-view monochromatic imager
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High-resolutionv visible echelle spectrograph with a imaging fiber unit
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Near-infrared Echelle spectrograph (ESPRIT)
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Near-infrared camera
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Coronagrapy with a DMD device