The advertising majors in Japanese universities are relatively good, depending on your academic qualifications and your own grades, you can apply to those schools. The School of Information Science of the University of Tokyo and the School of Media and International Tourism of Hokkaido University are the only two public universities that clearly have journalism and communication. The rest of the universities are divided into different colleges, some in systems engineering, some in sociology and some in political science.
You can locate your major, that is, use your major and grades to find the schools you can apply for at present. You can use the school selection system for studying abroad and enter your grades, basic majors and grades, so that you can know which advertising majors in Japan you can apply for.