The makeup on the Kyoshi warriors begins with a white base and red, well-associated with maiko, geiko, and geisha culture in general.
The fans and the fighting style resemble aikido (using force against the opponent), and there is a good chance that much of the forms that the warriors practice are tessenjutsu kata.
The sea has elephant koi and an unagi, both of which are native in Japan’s seas (though I’m not too sure about the existence of elephant koi…).
The village itself has buildings that resemble those in Shirakawa-Go and Gokayama villages. They are done in the “gassho-zukuri” style, or the “prayer-hands construction”…see the triangular roofs. (On a side note, these places are very famous to go to in the winter.)
Lastly, Kyoshi island seems to be very picky about outsiders, so that leads me to assume that the place was very isolated for a time…if that doesn’t sound characteristic of Japan, well…
Sources: Being a Japanese major, a poster that I saw in Sproul at UCD outside of a professor’s door, Jisho.org, and travel websites. And of course, A:TLA.