Looks like I'm necro-ing this thread after it's been dormant for months.
I was reading an article which mentioned the Sanshu no Jingi/Mikusa no Kamudakara/Imperial Regalia of Japan and how important it was as a symbol of the ruling line's authority and lineage from Amaterasu, the sun goddess.
So... did the Kuritas (avid cosplayers that they were) ever consider trying to get their hands on the three sacred items, and get the blood of Amaterasu (some female scion of the Japanese Emperor) into their own House?
Heck, does the Japanese Royal Family still exist at all after the Exodus era?
All these can make for an intriguing RPG adventure. Throw in Nova Cats, Goliath Scorpions, Comstar, Word of Blake, and it can be a rollicking saga for the ages!