My Daimyo keeps getting assassinated

[Azzarrel]

I wanted to win the game playing Ieyasu Tokugawa, but as soon as ANY ninja reaches him, he just dies. This has gotten so frustrating, that I manually modded him an insane low assassination chance (I started with reasonable numbers to avoid an overflow):
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It shouldn't be any mod, since I only run darthmod and mods with 1-2 tables I manually looked through using pack file manager. It also doesn't happen to any other general, but the AI also specifically seems to target my Daimyo.

Any way I can protect my Daimyo or find out what causes him to perish to every lvl1 ninja?

Not sure if this would be better in the modding section, so feel free to move.