Namihei Koshige, stunt man and suit actor for Power Rangers since season 2 of Mighty Morphin Power Rangers all the way up to RPM. He has mostly played female Rangers, like White Aquitar Ranger, Cheetah Ranger, Pink SPD Ranger and many others. I am subscribed to his You Tube channel and he recently posted this video. It doesn't reveal much, but it does confirm to me that he is once again working in Power Rangers. He and his wife moved to New Zealand when production originally moved there and I think he either stayed or return to japan and came back once again.
On his blog there are some revealing pictures:
This shows they are filming a scene where a man is fishing, it seems they are recreating Episode 7 of Shinkenger where the Blue Ranger had to fish for the Swordfish Zord (Kajiki Origami).
Also, it seems they are also using horses in Power Rangers Samurai.