Any taxations for NISA profits when leaving Japan?

I’ve started investing in NISA just last year. I’m still exploring my options on either staying in Japan ir returning back to my home country after few years.

In case I decide to return back, will there be any special tax attracted for the NISA based capital gains when transferring from a Japanese bank account to my home country?

I understand there are no taxes for capital gains under NISA but wanted to confirm if this still holds true when closing your NISA account and transferring your investments in bulk from Japan to home country..

Are there any additional perks that I should know – for example, holding PR will allow me park my miney ubder NISA for X years/doesnt attract additonal tax during bulk transfers etc.?