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We report on the electronic structure and electronic transport properties of skutterudite CoSb3 based on density functional theory utilizing the nonequilibrium Green’s function method. CoSb3 has a non-parabolic (linear) dispersion relation near the top of the valence band, and the hole effective mass is much smaller than the electron effective mass. This is the reason for the characteristic property that hole mobility is higher than electron mobility. This is completely different from that of ordinary semiconductors. The four-membered ring of Sb, which is one of the features in the crystal structure, is important in relation to the electronic structure and electronic properties. The relation of these crystal structure features to the electron transport properties is discussed. Then, the optimization of thermoelectric properties is discussed based on the chemical potential dependence of thermoelectric properties.

During the Meiji Restoration, there was a faction of strong willed patriots called Shishi in the Choshu Domain. This was the result of the education which had been done throughout the Edo period. The schools representing that education were the domain school Meirinkan and the private school Shokasonjuku Academy by Shoin Yoshida. In the Choshu Domain, we had some other excellent schools called Gogaku. They were built by the Mori clan and the upper samurai. They were proud of their facilities, many books, excellent teachers and students who were sons of the samurai. But little research has been done on these schools because there are only few sources whereas many researchers have focused on the Meirinkan and the Shokasonjuku. In this study, I focus on the Ikueikan Academy, a Gogaku built and managed by the Masuda clan who reigned Susa (now a part of Hagi city) and were political top leaders in the Choshu Domain. What historical conditions led to it’s foundation and what kind of education was practiced there ? How was the relation between the Ikueikan and the Shokasonjuku, and the exchange of the students ? How did the students of the Ikueikan contribute to the political movements during the Meiji Restoration ?

日本語を母語としない日本語学習者を対象とした日本語スピーチコンテストが，国内外で数多く実施されている。本学 の留学生も，地方で行われているコンテストに参加し，入賞している学生もいる。 コンテストヘの参加は，留学生本人の日頃の日本語学習の成果発表の場だと見られがちであるが，日本語学習の動機 づけや自信につながるだけではなく，留学生活を振り返って内省をする機会を得，日本文化への理解など促進させる効 果がある。また，周囲の人へ与えるインパクトも大きい。 本稿は，JLスピコンに参加した留学生や教職員の振り返りと日本人学生の感想文をもとに，それぞれにどのような変化が生じたかを概観し，留学生理解の一助とするものである。