Is it possible to pronounce the same surname differently in Japan?

Yes, the same Chinese character will have different pronunciations, which is caused by Japanese historical and cultural habits. Not to mention foreigners, I can't tell the correct pronunciation for days, so I can only confirm it one by one.

Because there are too many such examples, let's give some of the most common examples.

Yamazaki, Yamazaki

Nakata

Tadao, Tadao

Be especially careful when you meet the words battery, field and island (the second word of the surname)

It is common for Japanese to be called by the wrong name, so you should confirm it in person.