Distinct research student and academic student systems were established to provide for those who wish to pursue specific research projects in undergraduate school, graduate schools, language and culture research centers, etc. The period for research is set within one year. Research students are accepted for undergraduate and graduate school studies, while academic students are accepted for undergraduate studies. The admission period is the beginning of the semester, but in special cases permission may be given to join later during the semester. When students wish to continue research, their stay can be extended by following the required procedures. Once research is complete, students may request issuance of certificates to document the research.