Enclaves & clan holdings outside Clan lands.
I've seen the term "enclaves" thrown around a couple times in L5R. It seems to be used when a clan holds territory entirely within that of another clan. I am not sure if these are a defined thing in the lore or not (they don't seem to be). I imagine the clan embassies in Otosan Uchi might be considered "enclaves", and I've seen the various scattered holdings of the Tortoise Clan be referred to as such.
Would these be considered extraterritorial holdings, subject to the laws of the outside clan? Can yoriki from the city or province they are in enter one without permission from the holding clan?
How common would they be? I imagine neighboring clans would have lots of reasons for wanting a holding in the territory of their neighbor, whether for trade, diplomacy, coordinating shared activities (and of course spying).
Would cities in Imperial, Minor or Unaligned territory be more or less likely to have enclaves? I imagine port cities would be desired locations for these.
I'm curious if these have come up much at all in any lore or fiction. It could very well be that I've assumed too much and these aren't really a thing.
If you don't think enclaves are a thing, if you wanted to integrate them into the setting, what would you make them like?