KIRYOKU is a journal published by the Japanese Department of Vocational School at Diponegoro University. This journal is a media to accommodate scientific writings about Japan, including Japanese culture, Japanese Language, Japanese history, and Japanese politics. KIRYOKU is not only acting as a media for scientific publications, but also as a learning media for those who are interested in Japan. This Journal published four times a year (March, June, September and December).  The editorial team hope that the readers and writers are willing to offer suggestions dan constructive criticism to improve quality of the next issue.