So I finished the book and I got to say that it was definitely very different than the normal L5R fiction.
This was because the story was essentially a bunch of Rokugani (Unicorn) forced to go on a journey to meet the in universe equivalent of a Muslim Caliphate.
Long story short, the Caliphate and Rokugan's cultures are very different from one another.
It was hilarious to learn that the Unicorn handshaking custom came from the Caliphate's culture though.
Also, we seem to have gotten confirmation that Kami don't exist outside the emerald empire.
Instead it looks like jinn are one of the main spiritual "things" in the Caliphate.
Edited by Vulcan646