To maintain the quality of education in laboratory training with limited human resources, we developed an original method to carry out exercises led by undergraduate students themselves. Our concept is to let all students play individual roles during the seven-day exercises in pharmacology. Laboratory exercises are mainly animal studies using mice and guinea pigs, or a computer simulation of therapeutic drug monitoring. Each student is primarily allocated to a distinct role in the practice of his/her own choice. Faculty members coach the students assigned to respective exercises in advance, so that they learn how to guide their group on the day of practice. With the usage of this "YANEGAWARA" system, laboratory exercises in a large number of students could be operated under the supervision of a few faculty members. Detailed scheme of our trial will be presented at the symposium.