Hello

If the entrance exam is held separately for the three languages and you are sure that you wish to take admission in Japanese language only then you can skip attempting the other two exams. However, if you can mention that  you have applied for admission in which college/university then we can provide you the details accordingly.

Since it is late to answer this query, I hope you might have got admission. Do let us know if you have any other queries.

Good Luck!