This paper empirically examines the English learning motivation of the senior high school students who are studying English at a technical high school in Hiroshima Prefecture, Japan. Two measures, (1) motivation and (2) orientation, were administered to 144 Japanese technical senior high school students. The results of both the confirmatory factor analysis and the exploratory factor analysis revealed that Japanese technical senior high school students' English learning motivation and orientation were not as developed as those of Canadian learners of English as a second language. The results, however, confirmed the validity of the framework of intrinsic, extrinsic and amotivation, and of integrative and instrumental motivation, in describing Japanese technical senior high school students' motivation.