So some of you has shown interest in some of the Koei game blogs I have posted, so I figured I would do a small list of Koei games I recommend you playing, so here it is.
1. Romance of the Three Kingdoms ps2..
2. Nobunagans Ambition.
And for thoughs who like WW2 based strategy this ones a good one by Koei.
3. PTO IV. 
Then for all of you who own the NES.
4. Genghis Kahn. 
Then theres the SNES Genghis Kahn 2.
So I hope this helps with some of the best strategy gaming from Koei, and I highly recommend these games.
Koei made a world war 2 tactical strategy game? I had no idea!
the one on the snes was the best one they made the ps2 version was more 3d and not as good, but yes sir pto or pacific theater operations was a very good game especially the snes version.
The thought of Ghengis Khan as a cute little sprite makes me giggle.
PTO IV does look good. It's the only game you mention that I had not heard of. A WWII strategy game could prove rather challenging.
I want to try all of these.