Masashi Arita received the B.S. degree in materials science from Hiroshima University, Hiroshima, Japan, in 1980, and the Ph.D. degree in solid state physics from Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland, in 1987. He joined Ciba-Geigy Japan in 1987, where he was engaged in research on crystallography and electrophotography of organic substances. Since joining Nagoya University, Nagoya, Japan, in 1990, he has been engaged in research on crystallography and physical properties of metallic nano particles and ultrathin films. Since 1997, he has been an Associate Professor at the Graduate School of Engineering as well as the Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan. His major subject at present is in-situ electron microscopy of electronic devices.