Geodynamics Seminar is held in the evening of almost every Friday. We invite not only earth scientists but also those who work in related research fields, such as material sciences, solid state physics, engineering, inorganic chemistry, computer simulations, etc. as guest speakers, in addition to the GRC members. After the lecture, we normally have a small party with some beer, sake, and snacks and further discuss the subject. This seminar aims to exchange ideas and to promote collaboration with people of other disciplines and those outside GRC.