>futaba bans posting from other places besides japan, with a region lock, youre bound to have a limited pph, unless you are 4chan
While Futaba is not as active as 4chan when you take every board into account, Futaba's Nijiura may board still has a higher PPD than 4chan's top 3 boards (/vg/, /pol/, and /v/) combined

And the last time I calculated it (about 2 years ago), Futaba's Nijiura img board was neck-and-neck with may, making those 2 boards combined more active than 4chan's top 12 boards combined