1. You can probably take the required courses through OPEN UNIVERSITY the semester before you hope to get it. https://www.calstate.edu/attend/professional-and-continuing-education/Pages/open-university.aspx 2. You should consult with your Japanese university academic advisor (who can contact the CSU campus you want to enter) to see if any of the courses you already took can be applied to one of the Golden Four courses. 3. You could take these courses at a community college (best way IMO).
どなたか知りませんか?