The undergraduate course in Japanese universities is called "Japanese Language Department", which usually lasts for four years, just like the form in our country. Under special circumstances, the undergraduate course in Japan is a part of medical specialty, and it takes six years to graduate.

By the way, because the entrance to Japanese universities requires corresponding scores, in most cases, you need to study in a language school for a period of time (at least 1 year) to enter Japanese universities, and this time cost should be taken into account.

If it is a second-round exam for junior college degree in Japanese department, it is the length mentioned above, and if it is compiled, it is 2 years.