B.Sc

Hi Rohit,
Admission requirements vary from course to course and also on the university. In Japan, some in some M.Sc cases GMAT scores may be required while in some courses GRE scores may be required or may not require GMAT or GRE. Applicants must have obtained a certificate of Japanese Proficiency Language Test with a minimum of level 1 or 2, you must also take the IELTS. You should check the university/department website for details on admission criteria. After you graduate you will be allowed to apply and work as a full time employee just like any Japanese student.Check with the Japanese immigration website or the university for this.
For France too, M.Sc programmes typically don't require GMAT or GRE but an IELTS score. For PSW in France read this:
https://studyabroad.shiksha.com/post-study-work-permits-for-indian-students-in-france-applycontent5742