Kakuranger might not work as well with western audiences though because a lot of themes used in the show (Jiraiya as a Nikkeijin, Yokai) are hard to understand without explanation or knowledge of Japanese culture. So the show would lose a lot of it's meaning and charm.

i hear this a lot and i have to disagree. Kakuranger was only the 4th sentai i watched. after Dai, gokaiger and Zyu, and with the exception toku i consume no Japanese media or have a in depth familiarity with the culture.

there was certainly points i'm sure i missed but like most sentais the major themes come across easily enough the culture parts may go slightly over your head but it affecting how much you enjoy the story is minimal. The Yokai's are explained in most episodes anyway and Jiraiya background isn't that uncommon. Sure he is a nikkeijin but basically a outsider arroing in a foreign country isn't that much of a hard story to grasp,

Also GUIS released notes for each episode as they subbed them for this very reason. i didn't read them at all since i just wanted to watch the show and i still enjoyed it.

As said before, there is a slight loss and you don't experience the show like you're intened to enjoy it. I never said it's not gonna work at all.
However, there's some people, me included, if they know everything that's going in and want to enjoy the show in-depth, including analyzing themes used. I read the notes, but knew most of stuff from university because I'm studying Japanese. For me, it was good to have a full picture of what the authors wanted to do with their writing.

ahh i will fully admit i probably missed a bit then but i still enjoyed it

If my memory serves me correct, they do have bits in the show where they explain briefly about the yokai's lore so maybe?

Man! I wish I will dub Jetman as Bird Force

Ryu Tendo/Red Hawk as Ryan Taylor/Red Hawk!

Gai Yuki/Black Condor as Guy Yorkland/Black Condor!

Raita Ooishi/Yellow Owl as Robbie Osborn/Yellow Owl!

Kaori Rokumeikan/White Swan as Kate Rushman/White Swan

Ako Hayasaka/Blue Swallow as Amy Howard/Blue Swallow!

And Finally!

Jackie Chan as Narrator! :)

Not all of them though. And some of the social aspects could also spark some questions. Though you could research a lot of it. Except for the more obscure Yokai and imagery, I guess.

Yeah they do but thats really really minor stuff they talk about. But aside from that there is alot of cultural aspects in the show that reflect the times Kakuranger aired and not so much the medieval japan aspect.

Thats why if someone wants to watch Kaku I highly suggest to get ahold of the translator nots GUIS did for their releases and read them alongside the episodes. there is alot of interesting stuff going on in that show :D

And some of that stuff could also help understand little cultural things in other tokus as well.