Because RTK is mainly war torn period, the realism features are mainly from related to military and troops. I am not going into the “collect them all” or “add a friend” feature (aka relationship), levelling up your skills and slots for jobs.
So here are some other features which I feel that Koei has incorporated to make the game relative to history/story.
Or at least after I translated it, I hope you may have a better appreciation of KOEI’s war experience for the players.
I may be wrong.