When the temperature gets even higher, then electrons are separated from the atoms, resulting in a plasma state known as the fourth state of matter. Nuclear fusion technology, which is expected to be a next-generation large capacity energy source, and applied plasma technologies used in various industries (space, defense, semiconductor, display, automobile, environment, bio, medicine, sterilization, agriculture, food and so on), are all based on understanding of plasma behaviors. Plasmas behave in a complex manner according to the laws of nature depending on their conditions such as velocity distributions of ions and electrons, density and temperature of neutral particles within the plasmas, and magnitudes and profiles of electromagnetic fields. Our department conduct research in the field of plasma physics to develop fusion energy and to increase the efficiency of applied plasma technologies. Main research topics include plasma source development, plasma wave and instability analyses, plasma transport in various magnetic fields configurations, effect of neutral particles on plasmas, and plasma diagnostics development.