A "KOSEN (National Institute of Technology, Japan)" is the translated Japanese word used to describe the kōsen educational Japanese college system, a variety of programmes of 5 years of study at a collegiate level. The kōtō-senmon-gakkō (高等専門学校), often abbreviated to "KOSEN" (高専) are attended by students 15 years old or older.
There are 63 kōsen institutions in Japan; most were established by the national government. Most of the institutions are technical schools, each with an enrollment of about 200 students per grade, focusing on engineering and mercantile marine studies.