This study aims to analyze the current state, perceptions, and demands related to instrumental education in secondary school music classes, which has been receiving increasing emphasis in recent years, in order to identify issues and discuss possible solutions. To achieve this, various literature on the content, methods, and assessment of instrumental education was reviewed. Based on this review, a survey tool was developed to examine the actual state and demands of instrumental education, and a survey was conducted among secondary school music teachers across the nation. Statistical analysis was performed on the responses from 63 participants. The analysis revealed that secondary school music teachers strongly recognized the necessity of instrumental education. As a result, it was found that the majority of class time in music lessons is devoted to instrumental education. Most teachers also perceived a high level of student participation in instrumental lessons and held a very positive view of instrumental education. However, instrumental education was mainly limited to solo instrument instruction, focusing on posture, techniques, and basic performance skills, while instrumental ensemble activities were not well implemented, despite teachers’ high awareness of their importance. The predominant teaching method involved teachers directly demonstrating through performance and using modeling as an instructional approach. However, teachers felt that their own performance skills were inadequate. In terms of assessment, it was found that the evaluation of artistic and creative expression was not being adequately conducted.