got conflicting reports on how many are still flying today, (original, but restored). An article from 2016 that commented on a restored Zero that flew over Japan in 2016, first Zero over Japan in 71 years.... that said 'less than 10'.
Some reported only 1... but I think that was in the USA, not the world.
It's probably safe to say less than 10 still flying today.
For those interested... the oldest 'original' plane flying today is a 1909 French Bleriot airplane. It's in NY. Here's a photo but NOT of the one still flying.