We focus on the volcanically active Io and the icy moon Europa. Sulfur and oxygen ions generated from...

We are developing a near-infrared camera (TOPICS) and a high-dispersion Echelle spectrograph (wavelength resolution ~20,000) for near-infrared observations...

We observe auroral emissions from both space and ground, and combine them with satellites and ground-based radar to...

‘Geospace’ is the space around the Earth that consist of plasma (charged particles) originating from the Earth’s atmosphere...

“Have you heard that “Earth is like a giant magnet”? This magnet creates a vast region called the...

Auroral Kilometric Radiation (AKR), a type of auroral radio emission from Earth, is closely associated with various phenomena...

Since 2017 the Arase satellite has been investigating electron number density and temperature in the near-Earth environment. Electron...