This paper aims to analyze the teaching of the thematic unit named "Culture: Gazing and discovering" which is a part of Modern Japanese for the 11 th graders, evaluate the results, and point out the problems to be solved to reconstruct the whole curriculum. At the final stage of the plan, students were asked to write short essays on "what develops the culture" consisted of the following 3 paragraphs; (1) what students thought before starting the unit, (2) what they thought on the methods of recognition through studying each texts in the unit, and (3) what they realized through the activities of (1) and (2). One third of the students showed the evidence that they arrived at higher level of recognition, though the texts in the unit required them to think in the abstract to a high degree. By analyzing the unit construction and the teaching-learning process, we found the effectiveness of the arrangement of the selections, and student-centered teaching. But there are many students who could not achieve the expected objects. We should improve the construction of units and teaching-learning activities to help all the students arrive at desirable level.