Dr. Yoshihiro Kakinami obtained his Ph.D. from Hokkaido University. He is currently working at Hokkaido Information University in Hokkaido, Japan. He is mainly interested in dynamics of upper atmosphere. Recently, he is especially interested in the interaction between solid earth and atmosphere. Especially, he investigates response of ionosphere and thermosphere triggered by earthquakes, tsunamis and volcanic eruptions. He is also developing an early warning system of tsunami by using of infrasound emitted from tsunami source region.