This research introduces a strategy to raise intrinsic motivation to Japanese classes, and reveals its effect. this research analyzes from the viewpoint of self decision theory. This theory assumes three psychological desires, ""desire for autonomy"", ""desire for competence"" and ""desire for relationality"" as factors that increase intrinsic motivation. Then, we analyze how these psychological desires influence learners’ motivation. In order to raise endogenous motivation, this study adopted a learning strategies that emphasizes practice mainly for everyday conversation. This research subdivided the intrinsic motivation into three elements ""motivation for class activities "", ""motivation for Japanese language class"" and ""motivation for learning Japanese"", and measured motivation.
The analysis results are as follows. This strategy was able to satisfy all three psychological desires, and it was able to increase each of the intrinsic motivation. In addition, as a result of analyzing the correlation between three psychological desires and intrinsic motivation, the influence of ""desire for competence"" on intrinsic motivation was very strong. In order to raise the learning effect, it was confirmed that ""desire of competence"" is important. In other words, in teaching Japanese, it is necessary for teachers to actively encourage learners to fully recognize ""desire of competence"".