Arrived too late here.

If your start date is before Sengoku Jidai or after, you will get a random daimyo yes.
In fact I had to look up the random daimyo's names and change them in events.txt...

In the version 1.0 of the campaign you HAD to put (for example) the Imagawa daimyo in a province which in the original campaign is an Imagawa province, or else you won't get a daimyo! Don't know if this was arranged in the following versions of the editor - Hecose?

Another problem is that in non-SJ-dates, heirs are not assigned. So you have only one daimyo, and if he dies, you are lost.
Fortunately, lol, in my testing, the daimyo in 1130 seemed to never die or come to age... So that problem maybe is auto-eliminated because if heirs are not assigned, even the death of daimyos isnt!!!



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