Kiamet

If you like feudal Japan, political intrigue and deep strategy, then Sengoku should not be your entry point into games featuring those things. It's a very rewarding game, but requires a lot of patience and experimentation before you can find satisfaction. Once it all clicks though, it's very addictive and allows for great storytelling - betrayal, marriages of convenience, epic battles. Most of this is inferred through the gameplay however - some imagination is required, since the user interface is all business. The overall design is like a very advanced German board game. I recommend checking out the demo first - there are also some developer videos that explain some of the mechanics.