Abstract
This paper presents a case study of a multinational beginner-level class designed for graduate students in science and engineering. The teaching materials consist of three key components: learning natural conversation, engaging in discussions, and studying authentic materials. These components are structured in a spiral progression to facilitate and reinforce learners' understanding. This course places a strong emphasis on learning through discussions. Additionally, by practicing short utterances and responding promptly, the teacher helps students gain practical speaking experience and raises their awareness of language use in various contexts. Learners' reflections indicated increased confidence in speaking Japanese and greater motivation to continue learning the language.